ASTM A358 is a standard specification covering electrofusion-welded austenitic chromium-nickel stainless steel piping for high-temperature service and general applications. One specific stainless steel grade under this specification is TP316. It is widely used where excellent corrosion resistance and high-temperature strength are required. Contact US

ASTM A358 TP316 EFW Pipe Specification

ASTM A358 Standard Scope

ASTM A358 TP316 Stainless Steel EFW Pipe specification covers electric-fusion-welded austenitic chromium-nickel stainless steel pipe suitable for corrosive or high-temperature service, or both, or for general applications.

The dimensionless designator NPS has been substituted in this standard for such traditional terms as “nominal diameter,” “size,” and “nominal size.”

This specification covers the grades of alloy and stainless steel listed in Table 1. The selection of the proper grade and requirements for heat treatment shall be at the discretion of the purchaser, dependent on the service conditions to be encountered.

Five classes of pipe are covered as follows:

ASTM A358 Class 1 – Pipe shall be double welded by processes employing filler metal in all passes and shall be completely radiographed.
ASTM A358 Class 2 – Pipe shall be double welded by processes employing filler metal in all passes. No radiography is required.
ASTM A358 Class 3 – Pipe shall be single welded by processes employing filler metal in all passes and shall be completely radiographed.
ASTM A358 Class 4 – Same as Class 3 except that the weld pass exposed to the inside pipe surface may be made without the addition of filler metal.
ASTM A358 Class 5 – Pipe shall be double welded by processes employing filler metal in all passes and shall be spot radiographed.

Chemical Composition of ASTM A358 TP316 EFW Pipes

Mechanical Properties of ASTM A358 TP316 EFW Pipes

Main Features of ASTM A358 TP316 Stainless Steel EFW Pipe

Welding method: ASTM A358 TP316 Stainless Steel EFW Pipe adopts electrofusion welding (EFW), sometimes with internal and external weld trimming and heat treatment.

Wide size range: commonly used in the production of large-diameter, thick-walled pipes.

Strong corrosion resistance: especially suitable for chlorine, acid gas, seawater and other working conditions.

Good high temperature performance: can maintain stable mechanical properties under high temperature and high pressure.

ASTM A358 Grade 316 Stainless Steel EFW Pipes Plate Filer Metal Specification

TP316 Stainless Steel EFW Pipe Dimension

Benefits of Using ASTM A358 TP316 Pipes

Excellent Corrosion Resistance:

TP316 grade contains molybdenum, which significantly improves its resistance to pitting and crevice corrosion in chloride environments, far superior to the common TP304 stainless steel.

Excellent High Temperature Resistance:

ASTM A358 TP316 Stainless Steel EFW Pipe maintain good oxidation resistance and mechanical strength at high temperatures, making them suitable for high temperature service conditions.

Good weldability:

ASTM A358 standard specifies the Electrofusion Welding (EFW) process. It produces uniform and consistent welds and walls, ensuring the integrity of the pipe at high temperatures, pressures and corrosive conditions.

High strength and durability:

has good tensile and yield strength to withstand high pressures and flow rates. The overall structure is stable and durable, resisting mechanical damage and ensuring reliable performance over long periods of time.

Application Areas:

Oil and gas industry

Chemical and petrochemical plants

Power plants (boilers, heat exchangers)

Food and beverage processing industry

Pharmaceutical industry

Water treatment

Nuclear industry

Marine environment (due to excellent pitting resistance)

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

– Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

ASTM A358 TP316 Stainless Steel EFW Pipe Exported Countries

We Export ASTM A358 TP316 Stainless Steel EFW Pipe to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan,  Europe, Africa, Asia, North America, South America, Middle East.etc

Frequently Asked Questions (FAQs)

1. What is EFW stainless pipe?

EFW stainless steel pipe is formed by longitudinal or spiral welding of stainless steel plate or coil by arc heating, which has the advantages of high welding quality and good dimensional accuracy. The pipe is suitable for large caliber and thick-walled occasions, and is widely used in pressure pipelines, heat exchangers, chemical equipment and nuclear power and other fields with high requirements for strength and corrosion resistance.

2. What is a358 316 material?

ASTM A358 316 material refers to Grade 316 austenitic stainless steel pipe manufactured to the ASTM A358 specification for EFW pipe. Grade 316 stainless steel contains chromium, nickel, and molybdenum, which provide excellent corrosion resistance, especially in chloride-rich environments. This material is often used in chemical processing, marine applications, and high-temperature or high-pressure piping systems due to its excellent strength, durability, and resistance to pitting and crevice corrosion.

3. Which is better, ERW or EFW?

ERW and EFW have their own advantages and disadvantages and are suitable for different applications. Generally speaking, ERW pipes are used in low and medium pressure fluid transportation systems, such as water supply and natural gas pipelines, due to their high productivity and low cost. On the other hand, EFW pipes are mostly used in high-pressure, high-temperature or corrosive environments. Such as chemical, nuclear and boiler systems, where the quality of the welds is higher, and they are suitable for the manufacture of large-diameter, thick-walled pipes. Therefore, which is better depends on the specific needs of the application. If weld strength and corrosion resistance are important, EFW is better. If economy and medium strength are important, ERW is more suitable.

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ZIZI is a company specializing in the production and processing of pipes and fittings. The pipes and pipe fittings we produce are mainly used in chemical, petroleum, natural gas, water conservancy, electric power, marine engineering and other fields. The products mainly include seamless pipes, welded pipes, butt-welded pipe fittings, high-pressure forged pipe fittings and flanges of various sizes. The materials include carbon steel, stainless steel, alloy steel, low-temperature steel, duplex steel, base alloy, etc.

Dimensional Inspection

Purpose: To ensure that the geometric dimensions of the steel pipe meet the design and standard tolerances.

Outer Diameter (OD): Measure with a caliper or an OD gauge to check whether it is within the tolerance range specified in the standard.

Wall Thickness (WT): Measure with a thickness gauge to ensure that the wall thickness at each point meets the standard wall thickness tolerance (ASTM A312 has positive and negative deviation requirements for wall thickness, usually the negative deviation of the nominal wall thickness does not exceed 12.5%).

Chemical Composition Analysis

Purpose: To ensure that the chemical composition of the material meets the requirements of the F316L grade in the ASTM A312 standard. The key elements include carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si), chromium (Cr), nickel (Ni) and molybdenum (Mo). In particular, the low carbon content (maximum 0.035%) and at least 2.0% molybdenum content of F316L are critical to corrosion resistance.

ASTM A312 TP316L Stainless Steel Pipe Specification

Key Features

Excellent Corrosion Resistance: About 2.0% to 3.0% molybdenum is added to ASTM A312 TP316L stainless steel pipe, which significantly enhances its resistance to pitting and crevice corrosion in chloride environments (such as seawater, salt water). This makes it have better overall corrosion resistance than common 304 stainless steel.

Good Mechanical Properties: Minimum tensile strength is usually not less than 485 MPa (70 ksi). Minimum yield strength is usually not less than 170 MPa (25 ksi).

Ductility: Good ductility, easy to form and process.

High Temperature Performance: Able to maintain good strength and corrosion resistance at higher temperatures up to about 870°C (1598°F).

ASTM A312 TP316L Seamless Pipe Chemical Composition

ASTM A312 TP316L Seamless Pipe Mechanical Property

Stainless Steel Seamless Pipe Dimension

ASTM A312 TP316L Stainless Steel Seamless Pipe Application

Oil and gas industry: used for transporting crude oil, natural gas, chemicals and pipeline systems on offshore platforms and refineries.

Chemical and petrochemical industry: transporting various corrosive chemicals such as acids, alkalis and salt solutions.

Marine engineering: used for ships, offshore platforms, and seawater desalination equipment due to its strong resistance to chloride corrosion.

Pharmaceutical and food processing: its surface finish and corrosion resistance meet hygienic requirements and are used for transporting medicines, food and beverages.

Power industry: especially in power plant equipment that needs to withstand high temperatures and corrosive environments.

Papermaking and textile industry: resists corrosion from various processing media.

Water treatment and sewage treatment systems: resists corrosive substances in water.

The post ASTM A312 TP316L Stainless Steel Pipe Order appeared first on Quality Manufacturer of Industrial Pipe Fittings.

We specialize in manufacturing stainless steel seamless pipes, welded pipes, pipe fittings, flanges, and other related products. We also offer custom non-standard products based on customer specifications. Our products comply with international standards, including GB, ASTM, AISI, CNS, JIS, KS, IS, UNS, CSA, DGN, AS, BS, DIN, NF, and more. If you have any requirements, feel free to contact us. We look forward to cooperating with more customers.

Product Descriptions

What Is A ASTM A312 TP310S Stainless Steel Seamless Pipe

ASTM A312 TP310S stainless steel seamless pipe is a type of stainless steel pipe used in high-temperature and high-pressure environments. It provides outstanding resistance to heat and corrosion. And it is widely used in industries such as energy production, oil refining, and chemical processing.

We manufacture a wide range of products including stainless steel seamless pipes, welded pipes, pipe fittings, flanges, and more. Additionally, we can customize non-standard products to meet specific customer needs. Our materials include 321, 304, 304L, 316L, 347H, 310S, 904L, S31803/S32205, S32750/2507, S32760, INCONEL400, INCONEL600, INCONEL625, INCONEL800, C-276, and more. Our products are widely used in industries such as oil and gas, chemical, pharmaceutical, machinery, paper, food, power generation, water management, construction, aerospace, marine, and environmental protection. If you have any needs, feel free to contact us.

Features of ASTM A312 TP310S Stainless Steel Seamless Pipe

• Grade: ASTM A312 TP310S
• Material: TP310S Stainless Steel
• Type: Seamless
• Standard: ASME B36.19
• Dimensions and Size:
• Pipe Size: DN250 (Nominal Diameter 250mm)
• Length: 6 meters (LG)
• Wall Thickness: SCH80S
• Applications: Commonly used in industries such as chemical processing, power plants, petrochemical industries, and high-temperature systems.

ASTM A312 TP310S Seamless Pipe Chemical Composition

• Iron, Fe : 54%
• Chromium, Cr : 24-26%
• Nickel, Ni : 19-22%
• Manganese, Mn : 2%
• Silicon, Si : 1.50%
• Carbon, C : 0.080%
• Phosphorous, P : 0.045%
• Sulfur, S : 0.030%

ASTM A312 TP310S Seamless Pipe Mechanical Properties

• Grade : 310S
• Tensile Strength (MPa) min : 515
• Yield Strength 0.2% Proof (MPa) min : 205
• Elongation (% in 50mm) min : 40
• Hardness Rockwell B (HR B) max : 95
• Brinell (HB) max : 217

ASTM A312 TP310S Stainless Steel Seamless Pipe Equivalent Grades

• STANDARD: 310S
• WERKSTOFF NR.: 1.4845
• UNS: S31008
• JIS: SUS310S
• BS: 310S16
• GOST: 20Ch23N18
• AFNOR: –
• EN: X8CrNi25-21

Pictures of ASTM A312 TP310S Stainless Steel Seamless Pipe

Stainless Steel Pipe Dimensions & Weights

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304H stainless steel pipe is a high-carbon variant of 304 stainless steel, designed for high-temperature applications. It provides enhanced strength and corrosion resistance, making it ideal for industries like power generation, chemical processing, and heat exchangers.

Stainless steel is a versatile and widely used material in various industries, and one of its popular grades is 304 stainless steel. The “304” designation refers to its composition, which includes a significant amount of chromium and nickel, making it an austenitic stainless steel with excellent corrosion resistance, durability, and versatility.

What is the grade of SS304H?

SS 304H is a high-carbon variant of 304 stainless steel, designed for high-temperature applications. It is classified under the Austenitic Stainless Steel category and follows international standards such as:

Standards & Specifications for SS 304H

Main Features of SS 304H

✅ Higher Carbon Content → Improves strength at high temperatures.
✅ Better Creep Resistance → Suitable for applications above 1000°F (538°C).
✅ Good Weldability → Can be welded using standard techniques but may require post-weld heat treatment.
✅ Excellent Corrosion Resistance → Similar to 304 but slightly less than 304L due to higher carbon.

What is H grade stainless steel?

“H” grade stainless steel refers to high-carbon variants of standard stainless steel grades. These grades are specifically designed for high-temperature applications, where increased strength and creep resistance are required. The higher carbon content (typically 0.04% – 0.10%) enhances mechanical properties at elevated temperatures.

Common “H” Grade Stainless Steels & Their Differences

Key Features of H Grade Stainless Steel

Higher Carbon Content → Increases strength and creep resistance at elevated temperatures.

Improved High-Temperature Performance → Ideal for applications above 1000°F (538°C).

Slightly Reduced Corrosion Resistance → Higher carbon may slightly reduce corrosion resistance compared to the low-carbon (“L”) grades.

Comparison: H vs. L vs. Standard Grades

304H Stainless Steel Pipe Specification

304L/304H / 304 Stainless Steel Composition

Stainless Steel 304 / 304L / 304H Pipes Mechanical Properties

304H Stainless Steel Pipes and Tubes Physical Properties

Equivalent grades of AISI 304h Pipe

What is the difference between 304 and 304H?

The primary difference between 304 stainless steel and 304H stainless steel lies in their carbon content, which affects their strength, temperature resistance, and specific applications.

Which One Should You Choose?

If your application requires exposure to high temperatures (above 1000°F or 538°C), 304H is the better choice due to its increased strength.

For general-purpose corrosion resistance and room-temperature applications, standard 304 stainless steel is sufficient and more commonly used.

304 Stainless Steel Pipe: Heat Resistance

304 stainless steel is an austenitic stainless steel known for its excellent corrosion resistance, durability, and moderate heat resistance. It is commonly used in high-temperature environments but has certain limitations depending on the operating conditions.

 Maximum Operating Temperatures of 304 Stainless Steel

304 Stainless Steel Pipe Properties at High Temperatures

Creep Strength:

At 600°C (1112°F) and above, the material starts losing its strength.

304H stainless steel, a high-carbon variant, is recommended for better creep resistance.

Oxidation resistance

Below 870°C, 304 stainless steel can maintain good oxidation resistance, but if exposed to high-temperature oxidation environment for a long time, an oxide layer may be formed, affecting the service life.

Carburization resistance

In high-temperature environments, 304 stainless steel may reduce corrosion resistance due to carbide precipitation, especially intergranular corrosion is prone to occur between 450-850°C.

Mechanical property changes:

Above 600°C, the strength of 304 stainless steel will gradually decrease, which may affect its load-bearing capacity.

When used in long-term high-temperature environments, it may be necessary to select 304H stainless steel (high carbon version) to improve creep resistance and high-temperature strength.

304H Stainless Steel Pipe: Types of Packaging

Proper packaging of 304H stainless steel pipes is crucial to prevent damage during transportation and storage. The packaging method depends on factors such as pipe size, quantity, transportation mode, and customer requirements.

1. Bundling with Steel Straps

2. Wooden Cases or Crates

3. Plastic Wrapping or Shrink Film

4. End Caps & Protective Covers

5.Seaworthy Packing for Export

Choosing the Right Packaging Method

Stainless Steel Pipe Dimension

304H stainless steel pipe is a general purpose stainless steel pipe used in different industries. Its diameter ranges from 1/8” to 30”, and thickness ranges from SCH 5S to SCH 80S.

Permitted Tolerance in Wall Thickness

What is the advantage of 304 stainless steel?

1. Excellent Corrosion Resistance

2. High Strength and Durability

3. Good Weldability and Fabrication

4. Hygienic and Easy to Clean

5. Heat and Temperature Resistance

6. Aesthetic Appeal

7. Cost-Effective

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

– Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

304H Stainless Steel Pipe Exported Countries

We Export 304H Stainless Steel Pipe to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan,  Europe, Africa, Asia, North America, South America, Middle East.etc

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904L stainless steel pipe can operate stably for a long time in harsh environments exhibiting excellent corrosion resistance. This pipe can operate for a long time in high temperature environments without deformation or failure.

Features of 904L Stainless Steel Pipe

904L stainless steel pipes contains a high amount of chromium, nickel, molybdenum, copper and other elements, which work together to make it highly corrosion-resistant.

Chemical Composition

Mechanical Properties

What We Do

We are one of the leading manufacturer, suppliers, exporter of 904L stainless steel pipes. We are specialized in delivering our best quality products in all the world.

In July, we received an order for 904L stainless steel pipes from an old customer in China. This customer has established a good cooperative relationship with us. He has purchased 904L stainless steel pipe fittings, flanges and other products from us multiple times. This order placed a batch of 6-meter length 904L stainless steel pipes.

The signing of this order went very smoothly, and we delivered the goods on time within the specified delivery date. In order to ensure the safety of transportation, we have specially customized wooden box packaging for our customers, and they were very satisfied after receiving the goods.

How to Inspection of 904L Stainless Steel Pipe

904L stainless steel pipe‘s outer diameters ranging from 1/8 inch to 48 inches. The wall thickness includes SCH10S, SCH40S, SCH80S, etc. The production standards for 904L stainless steel pipes are in accordance with American standards ASME B36.10M and ASME B36.19M.

Outer Diameter Inspection

Wall Thickness Inspection

PMI Test for 904L Stainless Steel Pipe

Zizi Engineering Co Ltd. has been engaged in the production and sales of stainless steel pipes for many years. Immediate response, excellent quality, quick delivery and customer satisfaction truly define us. We look forward to collaborating with more customers to achieve win-win outcomes.

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