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ASTM A312 Stainless Steel Pipe

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Your Professional ASTM A312 Stainless Steel Pipe Supplier

 

 

Hebei Yongqiang Pipeline Co., Ltd is a professional steel pipe supplier integrating R&D, production, and sales. Our products include Austenitic Stainless Steel Pipe, Duplex Stainless Steel Pipe, Alloy Steel Pipe, Casing Steel Pipe, Steel Pipe Fittings, Steel Flanges, etc.

 

Why Choose Us
 

Rich Experience
Hebei Yongqiang Pipeline Co., Ltd. was established in 2006. We have more than ten years of business experience in exporting steel pipes.

 

Wide Range of Applications
Our products are used in many industries. For example, the Oil and Gas Industry, the Chemical Industry, the Construction Industry, and the Automobile Industry, etc.

 

Broad Market
Our company's business covers the Middle East, North Africa, South America, Southeast Asia, Central America, and other regions, with an annual export value of more than 10 million US dollars.

 

Leading Service
After the order is signed, we will maintain communication with the customer, report the production progress of the product to the customer on time, send the product production video or picture, and arrange transportation in advance. 

 

Definition of ASTM A312 Stainless Steel Pipe

 

 

ASTM A312 is a specification for seamless and welded austenitic stainless steel pipes that perform well in high temperature and corrosive environments. The common grades for this specification are 304/304L and 316/316L.

 

 
What are Advantages of ASTM A312 Stainless Steel Pipe？
 
01/

Low Corrosion

Stainless steel has a low corrosion rate. The metal will retain its rust-free appearance for many years, even when water is constantly inside the tubes. The metal is unlikely to leach into the water, and the metal contamination rate for stainless steel is nearly nonexistent.

02/

Appealing Appearance

Stainless steel pipes are attractive and look like modern, sleek décor. It is possible to leave stainless steel pipes exposed inside a building and have that add to the decorative aesthetic of the room, rather than detract from it like a plastic pipe would.

03/

Smaller Pipes

Steel pipes are highly efficient, and it is possible to use a smaller diameter of pipe made from steel than pipes made from other materials. The mass flow rate for stainless steel pipes is much higher per diameter than many other materials. This can save on the cost of the pipes without sacrificing flow rate.

04/

Strong

Stainless steel is strong and will resist damaging factors that can ruin other pipes, such as tree roots, human error, and extreme weather conditions.

05/

Recyclable

Unlike plastic pipes, steel pipes are 100 percent recyclable. When the pipes are no longer needed, they can be melted down and turned back into other useable metal pieces in other industries.

06/

Durable

Stainless steel pipes will not weather over time. The pipes will look and act the same in 20 years as they do today. The pipes will not sag and require much less support than plastic pipes.

 

What are Features of ASTM A312 Stainless Steel Pipe?
TP321 Stainless Steel Pipe
TP304H Stainless Steel Tube
TP347 Stainless Steel Pipe
S31500 Duplex Stainless Steel Pipe

Corrosion Resistance
The corrosion resistance of stainless steel pipes is integral to their use across multiple applications. Their chromium content creates a self-healing protective transparent oxide layer that stops oxygen atoms from penetrating and other oxidizing metal surface areas.
Stainless Steel pipe is highly resistant to high-temperature oxidation, making it ideal for heat exchangers and boilers in extreme temperatures. Furthermore, its corrosion resistance makes it suitable for harsh environments where other materials might fail.
The corrosion resistance of stainless steel pipes depends heavily on their installation environment, maintenance regimen, and type. For instance, 304 stainless steel may rust quickly if neglected in acid rain or seaside environments without proper care; in contrast, 316 stainless steel offers greater resistance against corrosion and rust than its 304 counterparts.

 

Strength
Stainless steel is a versatile material constructed of an alloy of steel with added chromium to increase corrosion resistance and protect surrounding materials from damage when they come in contact with it.
Corrosion resistance should always be an essential consideration when choosing stainless steel pipes for industrial uses since standard mild steels may become susceptible to corrosion in harsh environments and cause premature failure of their pipe system.
The degree of corrosion resistance for stainless steel pipes depends on their composition and service conditions. Austenitic grades perform best in harsher environments due to increased work-hardening properties that allow greater ductility and elongation.

 

Toughness
Stainless steel pipes are an increasingly popular form of mechanical tubing used across industries including oil and gas processing, chemical processing, corrosion-resistant applications and high strength needs.
Iron and chromium alloys typically include nickel, molybdenum, titanium or niobium for further strengthening their corrosion resistance, formability, hardness and strength. Depending on their alloy compositions, these metals can improve corrosion resistance, formability, hardness and strength properties.
Stainless steel pipe comes in different grades, such as austenitic, ferritic and duplex stainless steel. Each type is available in various sizes and specifications to meet various applications’ demands.

 

Durability
Stainless steel is one of the most resilient materials today, offering superior strength, toughness and corrosion resistance in extreme conditions.
Stainless steel pipe is durable and offers other properties that make it a valuable asset in industrial settings, such as rust resistance, high-temperature withstand ability and chemical resistivity.
Stainless steel pipe comes in various grades and sizes, such as austenitic, ferritic and duplex grades. Each type has its own set of properties and applications.

 

Sanitary Applications
Stainless steel pipes are popular for sanitation applications due to their resistance to corrosion and cleaning chemicals and ease of keeping clean. They offer great corrosion resistance while remaining easy to use and maintain.
SS pipes can be used for various sanitary applications, including food and beverage manufacturing, pharmaceutical research, bioengineering, and marine engineering. Welded or seamless pipes are both available in an assortment of sizes.
Stainless steel pipe (commonly referred to as metal tubing) is an extremely popular material for architectural components. Its strength and durability make it popular in high-rise residential buildings; marine projects often utilize it, too, as it resists rusting. Available in different sizes and designs, stainless steel is lightweight enough for fabrication, fitting quickly into desired dimensions.

 

Common Types of ASTM A312 Stainless Steel Pipe

Seamless Pipe (SMLS)

It covers stainless steel seamless pipe or tube in hot rolling or cold drawn.

Welded Pipe (WLD)

Welded by an automatic welding process that does not add filler metal when welding.

Cold Worked Pipe (HCW Pipe)

The heavy cold-worked pipe that apply cold working of not less than 35% reduction in thickness of both wall, and welded to the welded pipe prior to final annealing. Do not use fillers during welding.

Welded and HCW Pipe

Welded pipe and HCW pipe of 14 and smaller than NPS 14 shall have a single longitudinal weld.

 

 

Applications of ASTM A312 Stainless Steel Pipe

 

Healthcare

Hygienic medical supplies, machines, equipment, and other critical infrastructure for patient care are made of steel tubes. When lives are on the line, medical devices made of tubular steel should be as reliable and designed to the highest possible standard. This is done to aid situations requiring both critical care and surgical precision.

Numerous healthcare facilities use tubular steel, such as hospitals, clinics, birth centres, and blood banks. In addition, common use of tubular steel includes assembling parts for medical equipment like wheelchairs, gurneys, IV stands, and minor surgical instruments.

 

Fabrication

It is also possible to use tubular steel structurally in a wide range of building types ranging from low to high rises. It is possible to use them as decorative beams, rafters, roof decks, frameworks, rivets, and columns in residential spaces.

Because tubular steel is readily available, it is a popular choice for low-cost construction materials. With that said, steel can be reused without losing any of its usefulness. On the other hand, steel tubes are more cost-effective if you’re building a mid-range or low-cost warehouse. 

 

Petrochemicals

The petrochemical industry focuses on producing goods that necessitate the burning of fossil fuels or other high-energy processes. The systems and components they use must be capable of coping with these conditions.

Steel tubes are used in pipelines, heating, air conditioning systems, and other applications. As a result of the constant flow of fluid, these steel structures have been engineered to withstand biochemical reactions and high-pressure conditions. Tubular steel can be galvanized to prevent corrosion, allowing it to withstand chemical exposure and extreme temperature changes without losing its shape or quality.

 

Automobiles

Because tubular steel products typically have a melting point of between 1400 and 1540 degrees Celsius, they are a popular choice for automotive manufacturing because of this.

Combustion pipes, radiators, chassis, shock absorbers, and even the vehicle’s body/framework are all examples of steel tubes. Steel tubes are popular metal products not only because they can withstand high temperatures but also because of the increased safety they offer drivers.

 

Components of ASTM A312 Stainless Steel Pipe

C

The higher the carbon content, the higher the hardness of the steel, but the worse its plasticity and toughness;

S

It is a harmful contaminant in steel. When steel with high sulfur content is subjected to high temperature pressure processing, it is easy to be brittle, which is usually called hot brittleness;

Mn

It can improve the strength of steel, weaken and eliminate the adverse effects of sulfur, and improve the hardenability of steel. High-alloy steel (high-manganese steel) with high manganese content has good wear resistance and other physical properties.

Si

Silicon is added as reducing agent and deoxidizer in the steelmaking process, so killed steel contains 0.15-0.30% silicon. If the silicon content in the steel exceeds 0.50-0.60%, silicon is considered an alloying element. Silicon can significantly improve the elastic limit, yield point and tensile strength of steel, so it is widely used as spring steel. Adding 1.0-1.2% silicon to quenched and tempered structural steel can increase the strength by 15-20%. The combination of silicon and molybdenum, tungsten, chromium, etc. can improve corrosion resistance and oxidation resistance, and can manufacture heat-resistant steel. Low carbon steel containing 1-4% silicon, with extremely high magnetic permeability, used in electrical industry to make silicon steel sheets. An increase in the amount of silicon will reduce the weldability of the steel.

P

It can significantly reduce the plasticity and toughness of steel, especially at low temperature. This phenomenon is called cold brittleness. In high-quality steel, sulfur and phosphorus should be strictly controlled. But on the other hand, the high content of sulfur and phosphorus in low carbon steel can make it easy to cut, which is beneficial to improve the machinability of steel;

Cr

The basic element for stainless steel to obtain corrosion resistance. When the chromium content in the steel reaches about 12%, the action of chromium and the oxygen in the corrosive medium forms a thin oxide film (self-passivation) on the surface of the steel. film), which can prevent further corrosion of the steel matrix.

Ni

It can improve the strength of steel while maintaining good plasticity and toughness. Nickel has high corrosion resistance to acid and alkali, rust and heat resistance at high temperature. However, since nickel is a relatively scarce resource, other alloying elements should be used instead of nickel-chromium steel.

 

 
The Considerations for Buying

 

Corrosion Resistance
Corrosion is a main concern in chemical processing as exposure to corrosive chemicals and environments can lead to degradation of the pipes, leaks, and even catastrophic failures. Stainless steel pipes are well-known for their exceptional corrosion resistance properties, but different grades of stainless steel offer different levels of protection. It is important to choose a grade of stainless steel that is highly resistant to the specific chemicals present in the process.

Temperature and Pressure
Chemical processing often involves high temperatures and pressures, which can place immense strain on the piping system. Stainless steel seamless pipes are well-suited for coping with these conditions due to their seamless construction. However, it is crucial to choose a stainless steel grade that can withstand the desired operating temperature and pressure.

Material Purity and Cleanliness
In chemical processing, the purity of the transported fluids is of prime importance. Contamination from the pipe material itself can impact the quality of the end material negatively. Opt for pipes that are manufactured using high-quality raw materials and have undergone stringent purification processes. Look for stainless steel seamless pipe manufacturers who focus on industry standards and regulations to ensure the pipes’ cleanliness and suitability for chemical processing.

Maintenance and Lifecycle Costs
Even though stainless steel pipes are known for their durability and maintenance, it is still necessary to ensure their long-term performance. Consider the maintenance requirements of the stainless steel factors and grade in potential downtown and associated costs. Making an informed choice regarding the most cost-effective option also requires assessing the lifecycle costs, which include installation, maintenance, and replacement expenses.

Regulatory Compliance
Chemical processing is subject to various regulations and safety standards to protect both workers and the environment. Always ensure that the chosen materials comply with proper industry standards and regulations when choosing stainless steel pipes for chemical processing. This will not only ensure the safety of the operation but also help avoid legal and financial consequences.

 

Our Service

Pre-sale Service

Our company can provide 24-hour service to discuss product parameters, prices, delivery dates, transportation and other details with customers.

 

Sale Service

After the order is signed, we will maintain communication with the customer, report the production progress of the product to the customer in time, send the product production video or picture, and arrange transportation in advance.

After-sale Service

After the customer receives the product, if there is any objection to the product quality, we will communicate and resolve it in a timely manner.

Quality Solution

If it is confirmed that the quality loss is caused by us, we will reissue the unqualified product or make a cash compensation.

 

 
Our Certificate

 

Official certification, professional after sales service

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Frequently Asked Questions

 

Q: What types of stainless steel pipe are there?

A: As a general rule, any steel alloy that has at least 10.5 percent of chromium may be considered stainless steel. However, a multitude of grades is available depending on the mix of the alloying elements (Nickel. Chromium, Moly, Titanium, Copper, Nitrogen, etc.) Each alloy has a specific structure and chemical and mechanical properties.
The general attribute of stainless steels is that they show resistance to corrosion thanks to an outer chromium oxide layer. Such oxide acts like a microscopic protection layer that reacts with oxygen and blocks corrosion. Further, stainless steel alloys feature better toughness in cryogenic applications than carbon steel, better strength and hardness, improved ductility and low maintenance costs.
Stainless steels may be grouped into a few families, designated as “series”. Let’s take a closer look.
Austenitic Stainless Steel (Series 300)
These are the most common grades of stainless steel. The microstructure of austenitic stainless steels is obtained with the addition of nickel, manganese, and nitrogen that give weldability and formability properties to the alloy. The resistance to corrosion can be further improved by augmenting the percentage of chrome, moly, and nitrogen to the base alloy.
Nevertheless, the basic austenitic grades are vulnerable to stress corrosion cracking (higher percentages of nickel are necessary to enhance the stress corrosion cracking). Austenitic stainless steel cannot be hardened by heat treatment but have can work-hardened to high strength levels while retaining a reasonable level of strength and ductility.
Even if austenitic steels are generally non-magnetic, they can show some magnetic property based on the actual alloy composition and the work hardening given during production. Austenitic stainless steels are divided into the series 200 (chromium-manganese-nickel alloys) and 300 (chromium-nickel alloys like 304, 309, 316, 321, 347, etc). Stainless Steel 304 Pipes is the most common austenitic stainless steel that suits most corrosive applications. Any other grade in the 300 series enhances the basic features of SS304.
Martensitic Stainless Steel (Series 400)
Martensitic stainless steels are similar to ferritic steels as they both have remarkable chromium content, however, martensitic steels have higher carbon content up to 1 percent. The high carbon content allows martensitic steels to be hardened and tempered as standard carbon and chrome alloy steels (but show generally low weldability and ductility). This type of stainless steel is specified in case of high strength and moderate corrosion resistance requirements. Different from standard austenitic stainless steels, martensitic grades are magnetic. Common martensitic grades are 410, 420 and 440C.
Ferritic Stainless Steel (SS430)
Ferritic stainless steels have significant chrome content but low additions on carbon (generally below 0.1 percent). The name of this family of stainless steels comes from the fact that their microstructure is quite similar to carbon and low alloy steels.
These steels have a wide range of application, except for thin surfaces as they have a low resistance to welding or applications requiring formability (ferritic steels show low formability and ductility). Ferritic stainless steels cannot be hardened by heat treatment. By adding moly to a ferritic grade, the steel can be used in highly aggressive applications like desalination plants and seawater. These steel show also remarkable resistance to stress corrosion cracking. Likewise martensitic steels, ferritic SS is magnetic. The most common ferritic grades are the 430 (17 percent chromium), and the 409 (11 percent chromium), largely used in the automotive sector.
Precipitation hardening (PH 17-4)
PH steels can feature remarkable strength due to the addition, in the alloy, of elements as copper, niobium, and aluminum. These steels can be machined to very specific shapes with high tolerances requirements before the final aging treatment. This is different from conventional hardening and tempering of martensitic steels that are subject to distortion during the treatment.
The resistance to corrosion of precipitation hardening steels is comparable to standard austenitic steels like SS304. The most common precipitation hardening stainless steel is the 17-4PH, which features 17 percent chromium and 4 percent nickel.

Q: What are the applications of 304 stainless steel pipe?

A: Type 304/ 304L stainless steel is very common throughout the industry, especially in food processing, because it is not susceptible to acid corrosion in common foods. Therefore, this steel is very suitable for use in sinks, work surface, preparation areas and refrigerators. It is also an ideal material for pharmaceutical industry, such as clean room.

Q: What are the characteristics of 316 stainless steel pipe?

A: Type 316/ 316L are austenitic stainless steel with the molybdenum added. Compared with type 304/ 304L stainless steel, molybdenum has better overall corrosion resistance, especially for pitting and crevice corrosion in chloride environments. Type 316/ 316L stainless steel can provide excellent toughness and mechanical properties at sub-zero temperatures.
Type 316/ 316L stainless steel product is suitable for cold rolling, continuous mill plate and plate millplate form, thickness range up to 60 inch.
Type 316/ 316L stainless steel pipe are intended for use in applications that require high strength, toughness and workability, as well as enhanced corrosion resistance. Compare to 304 stainless steel, the alloy contains a higher percentage of molybdenum and nickel, which improves corrosion resistance. So it can be an ideal material for application in harsh environments. Type316L Stainless steel has a higher carbon content than Type 316, so as to reduce its weldability.

Q: Grade 304L austenitic stainless steel pipe used in which chemical processing?

A: The grade 304L is an austenitic stainless steel that can be used in mild chemicals with less acidity and less oxidation and reduction capacity. Food and beverages industries often deal with mild acids like carbonic acids, citric acid and tartaric acids. These are found in food items and are mild acids that do not corrode the 304L Pipe. The material has 18% chromium and 8% nickel along with other additions but with less carbon than the ordinary SS 304 Pipe material.
This composition allows certain range of chemical tolerance. Domestic applications, industrial and commercial applications that deal with mild chemicals can all use this material. There are limitations as what concentration of the chemicals can be allowed on 304l stainless steel pipe material. Even the strongest of materials like commercially pure titanium could corrode under heavy concentrations of strong acids like hydrochloric, sulfuric and nitric acids.
So the concentration of the chemical determines which type of steel could be used. The SS 304L Seamless Pipe has mild oxidation resistance, reduction resistance due to the addition of nickel and mild corrosion resistance due to the addition of chromium. So the application requirements determine which kind of chemical at which concentration could be allowed on 1.4306 Pipe material. 

Q: What surface treatments are available for 304 stainless steel pipe?

A: Hot rolled or cold rolled.
standard mill finish.
2B Finish (polished and brushed finishes).
2D Finish.
#4 finish (between 120 and 320 abrasive grit).
#3 finish (between 100-120 abrasive grit).
#8 finish.
180 grit finish.
2R (Bright Annealed).
Ground – 1G Hot Rolled / 2G Cold Rolled.
Dull Buffed – EN No. 2J for Cold Rolled.
1J for Hot Rolled / 2J for Cold Rolled.
1K for Hot Rolled / 2K for Cold Rolled.
Bright Polished – 2P for Cold Rolled.
Mirror Polished – 1P for Hot Rolled / 2P for Cold Rolled.
Electroplating or Electrodeposition.
Textured, Patterned.
Colouring.
Metal Spraying.
Paint / Enamel.
Electro Polishing.
Blast or Dry Etching.
Barrel / Vibratory Finishes.
Sample Swatch.

Q: What are the advantages of stainless steel pipe?

A: One of the main benefits of using stainless steel pipes is that they are incredibly strong. Stainless steel is one of the strongest materials available – it can be bent without breaking or cracking, making it ideal for tight spaces or curved shapes. It also has a high corrosion resistance, meaning it won’t rust or corrode over time as other metals might. In addition, stainless steel is easy to clean and maintain – all it needs is regular wiping with a damp cloth to keep it looking its best.
Another advantage is that stainless steel pipes are relatively inexpensive compared to other plumbing materials such as copper or brass. They also last much longer than other materials, so you won’t have to replace them as often as other types of pipes. Plus, they don’t require any special tools or fittings to install – basic plumbing skills will do!
Increased Durability
One of the primary advantages of stainless steel pipes is that they are incredibly durable. Stainless steel is a strong, tough material that can withstand a great deal of wear and tear. This makes it an ideal choice for applications where the pipe will be subject to a lot of stress or friction, such as in plumbing or automotive applications. Additionally, stainless steel pipes are resistant to corrosion, meaning they will not rust or degrade over time.
Improved Aesthetics
Another advantage of stainless steel pipes is that they offer improved aesthetics over other types of pipes. Stainless steel has a bright, shiny finish that is highly reflective. This can give your project a high-end look that is impossible with other materials.
Increased Strength
In addition to being durable, stainless steel pipes are also very strong. This makes them ideal for applications where strength is important, such as in structural applications. Stainless steel pipes can also be used in high-pressure applications without fear of them breaking or leaking.
Improved Safety
Another advantage of stainless steel pipes is that they offer improved safety over other types of materials. Stainless steel is non-toxic and does not leach chemicals into the water supply like some other materials, such as lead or copper. Stainless steel pipes are fire resistant, meaning they will not catch fire and spread flames like some other materials.
Easy to Clean
Another advantage of stainless steel pipes is that they are very easy to clean and maintain. Unlike other materials, such as wood or plastic, stainless steel does not absorb dirt or grime easily. This means that it can be cleaned quickly and easily with just a few simple steps.

Q: What types of stainless steel pipe are there?

A: Seamless Pipe
A pipe that has an absence of weld joints or seams is known as a seamless pipe. It can withstand intense or extreme temperatures and pressure. All the tanks go to the metal. The seamless pipe gets utilized in a comprehensive range of applications like gas and oil application. They are also utilized in mechanical as well engineering industries. This is what makes it versatile before they reach the client; it got inspected with a precision level that makes sure its high-quality assurance.
Welded Pipe
Almost in every industry, welded pipes got used because of their flexibility. However, they cost better when it comes to serving high corrosion resistance, thus opposing the pressure. The welded pipes are lightweight because of the kind of material used. They are cost-effective as compared to other piping methods when it comes to paying your money.
Pipe Flanges
Another important part overall piping system is required is pipe flanges. The pipe flanges are available in a variety like threaded, semis, lap joints, and blinds. They are sturdy material and durable which ensure the offering of high-quality product with the utmost level of reliability.

Q: What are the characteristics of stainless steel pipe?

A: Corrosion Resistance
Nearly all stainless steel pipes available in the market are iron-based alloys which comprised of minimum chromium content of 10.5%. A self-healing or protective oxide layer gets formed on the alloy when it contains chromium. The stainless steel pipe got its corrosion resistance property through the formation of the oxide layer. The self-healing characteristics of the oxide layer imply that intact corrosion resistance can be achieved regardless of fabrication means.
It has the capability to self-heal and offer high corrosion resistance even if the pipe surface experience any damage or cut. On the other hand, the protective layer is formed by normal carbon by coating or painting, such as galvanizing. Underlying steel, as well as corrosion, gets exposed on surface modifications.
The working of corrosion resistance may differ with different stainless steel pipe grades in various environments. The stainless steel pipe has two main characteristics in common- they possess resistance and contain chromium which makes it immune to attacks. The stainless steel pipe is unaffected by aggressive alkalis, acids, and other chemicals.
Pipe grades that contain high nickel, molybdenum and chromium show more resistance to corrosion.
Cryogenic Resistance (low temperature)-
The cryogenic resistance in low temperatures gets measured by toughness or ductility at sub-zero level temperatures. The austenitic stainless steel tensile strength is substantially higher at cryogenic temperature, compared to ambient temperature. They also possess the capability to maintain excellent toughness, in harsh environments.
At sub-zero temperatures, the precipitation hardening, martensitic, and ferritic steel pipe are not to be used. At low temperatures, the grade toughness significantly drops. It is found in some cases, the cryogenic resistance drops down closer to atmospheric temperature.
Work Hardening
One of the biggest advantages of work hardening of grades of stainless steel pipes is that it increases and enhances the metal strength significantly and helps in achieving cold working. The combination of annealing and cold working stages is easy to employ so as to give off fabricated components appropriate strength.
Hot Strength
High strength can be retained at peak or elevated temperatures. In the stainless steel pipe grades that contain huge chromium or silicon, nitrogen is responsible for hot strength. High hot strength can be offered for the grades of chromium ferritic grades.
The stainless steel pipe with high chromium content assists in resisting scaling at peak or elevated temperatures.
Strength and Formability
Stainless steel pipe of different grades offers different ranges of strengths. Compared to mild strength, the strength remains constant somewhat in soft conditions. The softer austenitic steel contains exceptional elongation and ductility. Hence, it can be cold-worked so as to give a finished product with extensive series of semi-fabrication. In order to reach the final condition, toughness and strength get combined in an effective manner.
A good range of ductility and strength get offered by the ferritic stainless steel pipes. The subsequent heat treatment gives off hardness and high strength, in the case of martensitic steel pipes.
Ductility
The % elongation is responsible for ductility while the tensile test is. The austenitic stainless steel elongation is high. High work hardening and high ductility rates enable austenitic stainless steel to form and work in severe processes like deep drawing.
High Strength
In comparison to mild steel, stainless steel has a higher amount of tensile strength. Duplex stainless steel generally has higher strength compared to austenitic steel. In the martensitic grade, the highest level of tensile strength can be seen, as well as in precipitation hardening grades. These grade types possess double strength compared to other grades.
Magnetic Response
Magnetic response is generally the attraction of stainless steel. Austenitic grades are purely non-magnetic, and they can be induced in a few austenitic grades through cold working. Grades like 316 and 310 are generally non-magnetic with cold working. All other stainless steel grades are magnetic.

Q: What industries are stainless steel pipe used in?

A: Oil and Gas
It is evident that in the gas and oil industries, technology and tools play a vital role. Over the past years, the requirement for corrosion-resistant piping systems has been explored deeply. Super duplex and duplex stainless steel pipes get used immensely in oil and gas industries. It shows incredible corrosion resistance in harsh and tough conditions. If there exists any damage, the pipe system would be unusable and burst easily for deeper depths. That is why it is recommended that sturdy pipes get used in the gas and oil industry so as to work well in the industry.
Nuclear Power
Gathering energy from the nuclei of an atom is not at all an easy task. The kind of nuclear reactor we make use of offer steam through water which is passed to spin turbines near the coast so as to get energy for cooling requirements. Then water is pumped to reactors through the stainless steel pipes. These pipes fulfil the need or requirement of corrosive nature in seawater. In order to defend against corrosion, stainless steel pipe must qualify so that it can be served the nuclear power industry.

Q: What shapes do stainless steel pipes come in?

A: Stainless Steel Round Pipes
The round pipes manufactured by us are generally austenitic class round pipes that is considered weldable through common methods such as resistance and fusion techniques. When it is cold formed production of visible undulated surface by the grain size is appeared known as “orange peel”.
The stainless steel pipes offered has modified version because of the combination of aluminium and titanium level so as to make use serving at optimal temperature. Because of austenitic microstructure, the round pipes are capable of offering impact strength at room as well as at cryogenic temperature.
Stainless steel seamless round pipes also show resistance toward formic, phosphoric, sulphuric, non oxidizing media and acetic acids. It also possesses resistance toward stress corrosion cracking, weld heat, knife line, pitting corrosion- that is considered affected zone attack. Exceptional corrosion resistance, in addition, makes round pipe fabrication possible.
For production of casing in gas and oil production, it gets supplied with higher strength properties. Some of the known features are consistent operation, ruggedly constructed, easy to maintain, affordable prices and superior in performance.
Stainless Steel Square Pipes
We offer distinguished stainless steel square pipes that works well in multi purpose plants such as in upset conditions frequently. For aggressive environments like chloride containing media, warm chlorinated seawater as well as acidic media, these pipes are particularly used.
Our production worker contains years of experience in effective manufacturing of these square pipes so as to provide low cost and high quality pipe with best service assurance. The temperature that it can withstand is 600 degree F and the carbon content is responsible for becoming critical.
The stainless steel square pipes get attached by gases in approximately 700 degree F as well as in molten sulphur attacks at 500 degree F. It offers similar corrosion resistance as that of nickel but with higher temperature and working pressure at low cost because of superior ability to get machined.
The SS Square Seamless Pipes that we offer is notable because of its toughness that gets maintained over a substantial range of temperatures and pressures. The square pipes are resistant to corrosion as well as to acids. Some alloys of pipes can withstand a blaze in pure oxygen. It is both cold-worked as well as hot-worked. The SS Square Welded Pipes doesn’t demand thermal treatment in order to develop the best combination of ductility of strength as well as to minimize distortion throughout subsequent machining. We offer these pipes in diverse sizes, shapes as well as in designs as per clients’ demand and need at reasonable price.
Similar to stainless steel round pipes it also has features as superior performance, considerable price, consistent operation, easy to handle, rugged construction and high grade quality.
Stainless steel rectangular pipes
The SS Rectangular Pipes that are offered by us show higher resistant towards; many corrosive medias that too with good electrical, thermal as well as magneto-strictive properties. The corrosion rate is low in pure unaerated acids for all application at atmospheric temperatures. In hot as well as concentrated solutions, the rate is usually high for rational service life.
Steel Rectangular Pipes must be utilized in nitric acid media only in solutions ranging with 0.5 % concentration at room pressure and temperature. These rectangular pipes are also utilized in sea water corrosion-resistant assemblies, cooling circuits, ammunition, and condenser tubes. Stainless Steel Rectangular Seamless Pipes that gets offered by us is readily get bigger into tube sheet that is necessary for the effortlessness of manufacture of tube shell and heat exchangers.
The rectangular pipes can be both hot and cold formed through stretch or drop hammer, hydropress, power brake methods. Stainless Steel Rectangular Welded Pipes is utilized for piping, seawater systems, heat exchangers and condensers in marine hardware. Sometimes it is utilized for the propellers, hulls of premium tugboats, crankshafts, fishing boats and working boats. We offer the rectangular pipes in unlike sizes, and shapes designs in accordance to clients’ specifications at practical price.

Q: What are the characteristics of stainless steel 316/316L pipes?

A: Corrosion resistance
Various atmospheric environmental ranges are offered in which the product works well. It is subjected to crevice corrosion and pitting corrosion in hot chloride environment. The product works well at 60 degree C for stress corrosion cracking. It shows resistant toward potable water at 1000mg/L under ambient temperature.
The 316 is regarded as “marine grade SS” however it is not at all resistant toward hot sea water. In marine environment, this product does inherit surface corrosion. This particular product comes in associated rough surface and crevice finish.
Heat resistance
In intermittent service, the product has good oxidation resistance. At 925 degree C it works well in continuous service. The grade 316 works well at 425-860 degree C and it is not recommended to use it in aqueous corrosion. Toward carbide precipitation, the grade 316L shows more resistance. It has higher strength at peak temperature and it shows pressure containing applications temperature exceeding 500 degree C.
Heat treatment
It is capable of working in solution treatment. It can be heated at 1010-1120 degree C and it can be cooled rapidly.
Welding
All standards grades can be welded using resistance and standard fusion methods. It can be welded with as well as without filler metals. The grade 316 has a requirement of post welding for corrosion resistance however no post welding annealing is required.
It isn’t weldable through oxyacetylene welding methods.
Machining
The 316L SS tends to work awesomely if machining is done. For constant feed rates and low speeds 316L is recommended.
316 is much easier to machining because of low carbon content.
Cold and hot working
It can be hot worked through hot working techniques. The temperature range 1150-1260 degree C is suitable for hot working temperatures. Some of the common working operations on 316L are drawing, stamping, shearing. Post work annealing is easily carried out via removing internal stress.
Hardening as well as work hardening
Toward heat treatment, 316L is not at all hardened. It can be only be hardened by cold working so as to increase strength.
The grade 316/316L is well used in architectural applications, marine applications and pharmaceuticals.

Q: What are the effects of chemical elements on stainless steel pipes?

A: Sulfur(S): Sulfur is also a harmful element under the normal circumstance. It will create the hot brittleness of stainless steel pipes, decrease the impact ductility of stainless steel pipes and bring cracks to stainless steel pipes in the forging and rolling processes. Besides, sulfur will also have negative impacts on the welding performance of stainless steel pipes and make stainless steel pipes have poor corrosion resistance. Therefore, in general, the content of sulfur is supposed to be less than 0.055%, and even less than 0.040% in some high-quality stainless steel pipes. However, if we add 0.08% to 0.20% sulfur to the steel of which the stainless steel pipes are made, the machinability of the steel can be much improved.
Chromium(Cr): Chromium can significantly improve the oxidation resistance and corrosion resistance of steel, increase the strength, hardness and wear resistance of stainless steel pipes, and decrease the plasticity and toughness of stainless steel pipes at the same time, which makes it an important element in the heat-resistant steel.
Nickel(Ni): Nickel can improve the strength and maintain good plasticity and toughness of steel. Nickel has very high corrosion resistance to acid and alkali, and has good rust and heat resistance at high temperatures. However, nickel is a scarce resource, so it would be better for us to use other elements instead of nickel.
Molybdenum(Mo): Molybdenum can make the grain of steel refined, improve the hardenability and thermal strength of stainless steel pipes and maintain the sufficient strength and creep resistance of the steel at high temperatures. The creep means that the steel will deform under the impact of stress if it is put at high temperatures for a long time. Adding molybdenum to the structural steel can help increase the mechanical properties of the structural steel and curb the brittleness of the alloy caused by fire.
Titanium(Ti): Titanium is a strong deoxidizer in steel. It can make the internal organization of steel dense, refine the grain, decrease the aging sensitivity and cold brittleness and improve welding performance of steel.
Vanadium(V): Vanadium is an excellent deoxidizer for steel. Adding 0.5% of vanadium to the steel can refine the grain as well as improve the strength and toughness of steel. Vanadium and carbon can form the carbide which can improve the hydrogen corrosion resistance of stainless steel pipes under high temperature and high pressure conditions.
Tungsten(W): Tungsten is a precious alloy element and has the high melting point. Tungsten carbide formed by the tungsten and carbon has high hardness and good wear resistance. Adding tungsten to the tool steel can significantly improve the red hardness and thermal strength of the tool steel.

Q: What factors affect the price of Stainless steel pipes?

A: Material Grade
One of the most significant factors determining the price of stainless steel pipes is the material grade. Stainless steel comes in different grades, offering different characteristics and properties. The higher the grade, the more expensive the stainless steel pipe. For instance, 304 stainless steel pipes are more affordable than 316 since 316 contains additional alloying elements that increase its strength and corrosion resistance.
Pipe Specifications
Another factor that affects stainless steel pipe prices is the pipe specifications. The pipe’s size, wall thickness, and length can all impact its cost. Large-diameter or thicker pipes are more expensive than smaller or thinner ones since they require more raw materials and labor to manufacture. Moreover, custom-made pipes requiring special fabrications or finishes may be more costly.
Market Demand and Supply
The law of supply and demand also plays a crucial role in determining the pricing of stainless steel pipes. Market demand and supply fluctuations can cause prices to fluctuate. If demand is high and supply is low, prices can rise. Conversely, if supply exceeds demand, prices may fall. Political and economic factors such as trade policies, exchange rates, and inflation can influence market demand and supply.
Manufacturing and Shipping Costs
The cost of manufacturing and shipping can significantly impact the price of stainless steel pipes. The quality of materials and production processes can affect the pipes’ cost. Additionally, the distance between the manufacturing plant and the shipping destination can increase shipping costs, particularly for bulky or heavy pipes. Freight charges, taxes, and import duties may also be added to the price of the pipes.
Discounts and promotions
Finally, purchasing stainless steel pipes in bulk or during promotional periods can save you considerable money. Many manufacturers offer discounts for large orders, extended payment terms, and other benefits. However, it is essential to consider the supplier’s reputation and the pipes’ quality before making a bulk purchase.

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