Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of astm a312 stainless steel pipe supplier | tp304 / tp316 seamless & welded pipe in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
Looking for best ASTM A312 stainless steel pipe manufacturers in China?
Xi'an Dongmeng Group Co., Ltd. supplies ASTM A312 / ASME SA312 stainless steel pipes in seamless, welded and EFW types for chemical processing, oil & gas, marine engineering, power plants, water treatment, food processing and general industrial piping systems.
We supply TP304, TP304L, TP316, TP316L, TP321, TP347, TP347H and TP310S stainless steel pipes with stable quality control, full-size customization, MTC EN 10204 3.1, PMI testing, hydrostatic testing, UT / ET inspection and export seaworthy packing.
Professional team
7x24 hours delivery
What Is ASTM A312 Stainless Steel Pipe?
ASTM A312 / ASME SA312 stainless steel pipe is a standard specification for seamless, welded and heavily cold worked welded austenitic stainless steel pipe used for high-temperature and general corrosive service.
ASTM A312 pipe is widely used in pressure piping systems where corrosion resistance, temperature resistance, dimensional accuracy and certified material traceability are required. Common grades include TP304, TP304L, TP316, TP316L, TP321, TP347 and TP310S.
Compared with ordinary stainless steel tube, ASTM A312 stainless steel pipe is mainly used for industrial piping systems, pressure pipelines, chemical transfer lines, process piping, marine pipelines, boiler systems and petrochemical projects.
Why Choose ASTM A312 Stainless Steel Pipe?
ASTM A312 stainless steel pipe is selected by EPC contractors, distributors, engineering companies and industrial end users because it provides a reliable balance of corrosion resistance, mechanical strength, weldability and international standard compliance.
Key advantages include:
Suitable for high-temperature and general corrosive service
Available in seamless and welded pipe types
Wide grade selection for different corrosion environments
Compatible with ASME B36.19M stainless steel pipe dimensions
Available in SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160 and XXS
Good weldability for piping fabrication and installation
MTC, PMI, hydrostatic testing and third-party inspection available
Suitable for international industrial projects and export orders
ASTM A312 Stainless Steel Pipe – Technical Specifications
ASTM A312 Stainless Steel Pipe is a high‑performance corrosion‑resistant austenitic steel pipe manufactured according to ASTM A312 / ASME SA312 standards. Available in seamless and welded forms and various grades (304, 304L, 316, 316L etc.), it is widely used in oil & gas, chemical processing, shipbuilding, pressure piping and industrial liquid distribution systems worldwide. As a trusted stainless steel pipe supplier, we offer certified quality, custom sizes, and global delivery.
| Item | Specification |
| Product | ASTM A312 Stainless Steel Pipe |
| Standard | ASTM A312 / ASME SA312 |
| Dimension Standard | ASME B36.19M / ASME B36.10M |
| Material Grade | TP304, TP304L, TP316, TP316L, TP321, TP347, TP347H, TP310S |
| Manufacturing Type | Seamless, Welded, EFW, Heavily Cold Worked Welded |
| Nominal Pipe Size | NPS 1/8"–24" regular supply; welded large diameter pipe up to 48" available |
| Outside Diameter | 10.3mm–610mm regular range; larger welded sizes upon request |
| Wall Thickness | SCH 5S, 10S, 40S, 80S, 160S, XS, XXS |
| Length | 5.8m, 6m, 11.8m, 12m, or custom cut length |
| Surface Finish | Pickled, annealed, passivated, polished, bright annealed |
| End Type | Plain end, beveled end, threaded end, capped end |
| Testing | PMI, hydrostatic test, UT, ET, visual inspection, dimensional inspection |
| Certificate | MTC EN 10204 3.1 / 3.2, ISO 9001, SGS / BV / TUV available |
| Packing | Bundles, plastic caps, waterproof wrapping, wooden cases, shipping marks |
| Application | Oil & gas, chemical, petrochemical, marine, power plant, water treatment, food processing |
Available ASTM A312 Stainless Steel Pipe Grades
| Grade | UNS No. | Main Feature | Recommended Application |
| TP304 | S30400 | General corrosion resistance and good formability | Water treatment, food processing, general industrial piping |
| TP304L | S30403 | Low carbon, better weldability | Welded piping systems, fabrication projects, food and beverage lines |
| TP316 | S31600 | Contains molybdenum, better chloride resistance | Chemical processing, marine piping, offshore systems |
| TP316L | S31603 | Low carbon + molybdenum, excellent weldability | Chemical plants, desalination, pharmaceutical, marine projects |
| TP321 | S32100 | Titanium stabilized, better high-temperature stability | Heat exchangers, boiler systems, high-temperature piping |
| TP347 | S34700 | Niobium stabilized, suitable for intergranular corrosion resistance | Refinery, petrochemical, high-temperature welded systems |
| TP347H | S34709 | High carbon version for elevated temperature service | Power plants, boilers, high-temperature pressure systems |
| TP310S | S31008 | High chromium and nickel for heat resistance | Furnace parts, thermal equipment, high-temperature piping |
Grade Selection Guide for B2B Buyers
ASTM A312 TP304 Stainless Steel Pipe
TP304 is the most commonly used stainless steel pipe grade for general industrial piping systems. It provides good corrosion resistance, good weldability and cost-effective performance.
Recommended for:
General industrial pipelines
Water treatment systems
Food and beverage processing
Low to medium corrosion environments
Indoor piping and mechanical systems
ASTM A312 TP304L Stainless Steel Pipe
TP304L has lower carbon content than TP304, which helps reduce sensitization risk after welding. It is preferred for welded piping systems and fabrication projects.
Recommended for:
Welded pipe systems
Food processing pipelines
Beverage transfer lines
Fabricated pipe spools
Projects requiring better weldability
ASTM A312 TP316 Stainless Steel Pipe
TP316 contains molybdenum, offering better resistance to chloride corrosion, pitting and crevice corrosion compared with TP304.
Recommended for:
Chemical processing
Marine environments
Seawater-related systems
Offshore platforms
Industrial fluid transfer
ASTM A312 TP316L Stainless Steel Pipe
TP316L combines low carbon content with molybdenum-enhanced corrosion resistance. It is one of the most preferred grades for chemical, marine, pharmaceutical and desalination projects.
Recommended for:
Chemical plants
Desalination systems
Pharmaceutical piping
Coastal and marine projects
Welded corrosion-resistant pipelines
ASTM A312 TP321 Stainless Steel Pipe
TP321 is titanium stabilized and suitable for high-temperature service where resistance to intergranular corrosion after welding is required.
Recommended for:
Heat exchangers
Boiler piping
Exhaust systems
High-temperature process pipelines
Thermal equipment
ASTM A312 TP347 / TP347H Stainless Steel Pipe
TP347 and TP347H are niobium stabilized grades designed for high-temperature service and improved resistance to intergranular corrosion.
Recommended for:
Refineries
Petrochemical plants
Power generation
High-temperature pressure piping
Boiler and superheater systems
Seamless vs Welded ASTM A312 Stainless Steel Pipe
| Type | Advantage | Recommended Use |
| Seamless Pipe | No weld seam, higher pressure resistance, suitable for critical service | High-pressure lines, boiler systems, refinery piping, oil & gas projects |
| Welded Pipe | Cost-effective, good dimensional accuracy, suitable for many industrial applications | Water treatment, chemical transfer, food processing, general piping |
| EFW Pipe | Suitable for large diameter and heavy wall requirements | Petrochemical plants, large industrial pipelines, power plants |
| Heavily Cold Worked Welded Pipe | Improved mechanical properties after cold working | Special pressure piping and project-specific requirements |
Choose seamless stainless steel pipe when pressure, temperature and safety requirements are critical. Choose welded stainless steel pipe when cost control, large quantity, dimensional stability and general corrosion resistance are more important. For large diameter piping projects, EFW stainless steel pipe is often a practical solution.
ASTM A312 Weight Chart
ASTM A312 is an American standard specification for seamless, straight-seam welded, and welded stainless steel pipes intended for high-temperature and general corrosion-resistant applications. It is one of the most widely used standards for stainless steel piping in industrial systems.
Warehouse
Processing services
ASTM A312 Stainless Steel Pipe Sizes and Dimensions
| Nominal Pipe Size (NPS) | Outside Diameter (OD) | Wall Thickness (WT) | Schedule (SCH) | Weight (kg/m) |
|---|---|---|---|---|
| 1/2" | 21.3 mm | 1.2 mm - 2.4 mm | SCH 10, SCH 40 | 0.91 - 1.68 |
| 3/4" | 26.7 mm | 1.2 mm - 2.8 mm | SCH 10, SCH 40 | 1.15 - 2.08 |
| 1" | 33.4 mm | 1.2 mm - 3.2 mm | SCH 10, SCH 40, SCH 80 | 1.47 - 3.02 |
| 1 1/4" | 42.2 mm | 1.5 mm - 4.0 mm | SCH 10, SCH 40, SCH 80 | 2.05 - 4.28 |
| 1 1/2" | 48.3 mm | 1.5 mm - 4.0 mm | SCH 10, SCH 40, SCH 80 | 2.35 - 4.86 |
| 2" | 60.3 mm | 1.8 mm - 4.5 mm | SCH 10, SCH 40, SCH 80 | 3.34 - 6.98 |
| 2 1/2" | 73.0 mm | 2.0 mm - 5.0 mm | SCH 10, SCH 40, SCH 80 | 4.31 - 8.80 |
| 3" | 88.9 mm | 2.3 mm - 5.6 mm | SCH 10, SCH 40, SCH 80 | 5.74 - 11.50 |
| 4" | 114.3 mm | 2.9 mm - 6.6 mm | SCH 10, SCH 40, SCH 80 | 7.60 - 15.32 |
| 6" | 168.3 mm | 3.4 mm - 8.0 mm | SCH 10, SCH 40, SCH 80 | 11.84 - 23.82 |
| 8" | 219.1 mm | 4.0 mm - 10.0 mm | SCH 10, SCH 40, SCH 80 | 16.34 - 32.87 |
| 10" | 273.0 mm | 4.5 mm - 12.0 mm | SCH 10, SCH 40, SCH 80 | 21.93 - 43.11 |
| 12" | 323.8 mm | 5.0 mm - 14.0 mm | SCH 10, SCH 40, SCH 80 | 27.82 - 55.75 |
| 14" | 355.6 mm | 5.6 mm - 15.0 mm | SCH 10, SCH 40, SCH 80 | 32.52 - 65.79 |
| 16" | 406.4 mm | 6.0 mm - 16.0 mm | SCH 10, SCH 40, SCH 80 | 38.62 - 77.73 |
| 18" | 457.0 mm | 6.4 mm - 18.0 mm | SCH 10, SCH 40, SCH 80 | 45.00 - 89.76 |
| 20" | 508.0 mm | 7.1 mm - 20.0 mm | SCH 10, SCH 40, SCH 80 | 51.37 - 102.94 |
| 24" | 610.0 mm | 7.9 mm - 22.0 mm | SCH 10, SCH 40, SCH 80 | 61.45 - 121.31 |
| 30" | 762.0 mm | 9.5 mm - 24.0 mm | SCH 10, SCH 40, SCH 80 | 76.64 - 151.59 |
| 36" | 914.0 mm | 10.5 mm - 28.0 mm | SCH 10, SCH 40, SCH 80 | 91.85 - 181.76 |
| 42" | 1067.0 mm | 12.0 mm - 32.0 mm | SCH 10, SCH 40, SCH 80 | 108.00 - 213.50 |
| 48" | 1219.0 mm | 13.0 mm - 36.0 mm | SCH 10, SCH 40, SCH 80 | 126.00 - 247.43 |
Legend:
Nominal Pipe Size (NPS): The size designation of the pipe, commonly used in the U.S.
Outside Diameter (OD): The external diameter of the pipe.
Wall Thickness (WT): The thickness of the pipe wall.
Schedule (SCH): Defines the wall thickness and pressure rating. Common schedules are SCH 10, SCH 40, SCH 80, SCH 160, and SCH XXS (extra-thick wall).
Weight (kg/m): The weight of the pipe per meter of length.
ASTM A312 Chemical Composition
| Steel Grade | ASTM A312 Chemical Composition % Max | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Mn | P | S | Si | Cr | Ni | Mo | N B | Nb | Ti | |
| TP304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 | 8.0-11.0 | … | … | … . | … |
| TP304H | 0.04-0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 | 8.0-11.0 | … | … | … | … |
| TP304L | 0.035 D | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 | 8.0-13.0 | … | … | … | … |
| TP310S | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 24.0-26.0 | 19.0-22.0 | 0.75 | |||
| TP316 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0-18.0 | 11.0-14.0 | 2.00-3.00 | … | … | … |
| TP316L | 0.035 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | … | … | … |
| TP316H | 0.04-0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0-18.0 | 11.0-14.0 | 2.00-3.00 | … | … | … |
| TP316Ti | 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | 0.10 | … | 5x(C+N)-0.70 |
| TP321 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-12.0 | … | 0.10 | … | 5C-0.70 |
| TP321H | 0.04-0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-12.0 | … | … | … | 4C-0.60 |
| TP347 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-13.0 | 10xC-1.00 | … | ||
| TP347H | 0.04-0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-13.0 | … | … | 8xC-1.00 | … |
ASTM A312 Mechanical Property
| ASTM A312 Mechanical Properties | |||||
|---|---|---|---|---|---|
| Steel Grade | Heat Treatment |
Temperure Min. º F(º C) |
Tensile Strength Ksi (MPa), Min. |
Yield Strength Ksi (MPa), Min. |
Elongation %, Min |
| TP304 | Solution | 1900 (1040) | 75(515) | 30(205) | 35 |
| TP304L | Solution | 1900 (1040) | 70(485) | 25(170) | 35 |
| TP304H | Solution | 1900 (1040) | 75(515) | 30(205) | 35 |
| TP310S | Solution | 1900 (1040) | 75(515) | 30(205) | 35 |
| TP316 | Solution | 1900(1040) | 75(515) | 30(205) | 35 |
| TP316L | Solution | 1900(1040) | 70(485) | 25(170) | 35 |
| TP316H | Solution | 1900(1040) | 75(515) | 30(205) | 35 |
| TP316Ti | Solution | 1900(1040) | 75(515) | 30(205) | 35 |
| TP321 | Solution | 1900(1040) | 75(515) | 30(205) | 35 |
| TP321H | Solution | Cold: 2000(1100) Hot: 1925(1050) |
75(515) | 30(205) | 35 |
| TP347 | Solution | 1900(1040) | 75(515) | 30(205) | 35 |
| TP347H | Solution | Cold: 2000(1100) Hot: 1925(1050) |
75(515) | 30(205) | |
ASTM A312 Equivalent steel grade:
| ASTM A312 | JIS G3459 | DIN 17440 | BS | NF |
|---|---|---|---|---|
| TP304 | SUS 304 TP | X5CrNi 18 9 | 304S18 | A 49-230 |
| TP304H | SUS 304 HTP | 304S59 | A 49-214 | |
| TP310 | 304 LTP | X2 CrNi 19 9 | 304S14 | A 49-230 |
| TP316 | SUS 304L TP | |||
| TP316H | 310STP | X5 CrNiMo 18 10 | 316S18 | A 35-573 |
| TP316L | SUS 316 TP | 316S59 | A 49-230 | |
| TP321 | SUS 316 LTP | X2 CrNiMo 18 10 | 316S14 | A 49-230 |
| TP347 | 316 HTP | x10 CrNiTi 18 9 | 321S18 | A 49-230 |
| TP347H | SUS 316 LTP | X5 CrNiNb 18 9 | 347S18 | A 35-573 |
Nominal wall thickness for ASTM A312(Seamless and straight seame welded steel pipes)
| NPS | ASTM A312 WT Tolerance, % | |
|---|---|---|
| + | – | |
| 1/8-2 1 /2 | 20.0 | 12.5 |
| 3~18, t/D≤ 5% | 22.5 | 12.5 |
| 3~18, t/D> 5% | 15.0 | 12.5 |
| ≥ 20, welded | 17.5 | 12.5 |
| ≥ 20, seamless, t/D≤ 5% | 22.5 | 12.5 |
| ≥ 20, seamless, t/D> 5% | 15.0 | 12.5 |
ASTM A312 Stainless Steel Pipes OD Tolerance
| NPS | ASTM A312 OD Tolerance | |||
|---|---|---|---|---|
| + | – | |||
| inch | mm | inch | mm | |
| 1/8~1 1 /2 > 1 1 /2~4 > 4~8 > 8~18 > 18~26 > 26~34 > 34~48 |
1/64(0.015) 1/32(0.031) 1/16(0.062) 3/32(0.093) 1/8(0.125) 5/32(0.156) 3/16(0.187) |
0.4 0.8 1.6 2.4 3.2 4.0 4.8 |
1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) |
0.8 0.8 0.8 0.8 0.8 0.8 0.8 |
Surface Finish
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
Pipe End
Plain end
Beveled end
Threaded end
Coupling end
Plastic caps
Special end preparation for welding projects
Applications of ASTM A312 Stainless Steel Pipe
ASTM A312 stainless steel pipe is widely used in industries that require excellent corrosion resistance, high strength, and reliable performance under high temperature and pressure conditions. Due to its seamless and welded manufacturing options, it is suitable for both critical process systems and general industrial piping applications.
🛢️ Oil & Gas Industry
ASTM A312 stainless steel pipes are extensively used in upstream, midstream, and downstream oil & gas systems, including pipelines, offshore platforms, and refinery processing units. TP316 and TP316L grades are preferred for their superior resistance to chloride corrosion and harsh environments.
🧪 Chemical & Petrochemical Plants
Ideal for transporting acids, alkalis, and chemical fluids, ASTM A312 pipes provide excellent resistance to corrosive media, making them suitable for reactors, heat exchangers, and process piping systems.
⚡ Power Generation Industry
Used in power plants for boiler systems, steam lines, and heat transfer equipment, where high-temperature strength and oxidation resistance are critical for long-term operation.
💧 Water Treatment & Desalination
Widely applied in seawater desalination plants, wastewater treatment systems, and potable water pipelines due to excellent resistance to pitting and chloride-induced corrosion.
🏭 Food & Beverage Industry
ASTM A312 stainless steel pipes (especially TP304 and TP316) are used in sanitary piping systems for food processing, dairy production, and beverage manufacturing, ensuring hygiene and non-contamination.
❄️ HVAC & Heat Exchanger Systems
Used in heating, ventilation, air conditioning, and industrial heat exchangers due to excellent thermal stability and corrosion resistance in continuous service conditions.
🚢 Marine & Offshore Engineering
Highly suitable for shipbuilding, offshore structures, and coastal engineering projects where exposure to saltwater environments requires strong corrosion resistance.
🏗️ General Industrial Applications
Also used in structural piping, mechanical systems, instrumentation lines, and industrial fabrication projects requiring durability and compliance with ASTM A312 standards.
ASTM A312 vs ASTM A358 vs ASTM A269 Stainless Steel
| Feature | ASTM A312 | ASTM A358 | ASTM A269 |
|---|---|---|---|
| Standard Scope | Seamless & welded austenitic stainless steel pipes | Electric fusion welded (EFW) stainless steel pipes for high-temperature service | Seamless stainless steel tubing for general service |
| Manufacturing Type | Seamless + Welded | Welded (EFW only) | Seamless only |
| Primary Application | General industrial piping, oil & gas, chemical | High-temperature and corrosive service (large diameter piping) | Instrumentation, heat exchangers, precision tubing |
| Pipe Size Range | 1/8" – 30" | 8" and above (typically large diameter) | Small diameter tubing |
| Pressure Rating | High (especially seamless) | Medium to high (depends on class) | Medium |
| Temperature Resistance | Excellent | Excellent (high-temp designed) | Good |
| Welding Requirement | Optional (seamless or welded) | Mandatory full penetration welds | Not typical (seamless only) |
| Corrosion Resistance | Excellent (304/316 grades) | Excellent in high-temp corrosive environments | Excellent for clean systems |
| Typical Grades | TP304 / 304L / 316 / 316L / 321 | TP304 / TP316 (plate-based welded pipes) | 304 / 316 tubing grades |
| Key Advantage | Most widely used industrial pipe standard | Best for large-diameter welded high-temp pipelines | High precision, clean surface, instrumentation use |
| Common Industries | Oil & Gas, petrochemical, power plants, water treatment | Refinery, chemical plants, large industrial piping systems | Medical, instrumentation, heat exchangers |
we are here for you
Quality & Certs
Xi'an Dongmeng Group Co., Ltd. applies strict inspection procedures before shipment to ensure ASTM A312 stainless steel pipes meet project requirements.
Our inspection process includes:
Raw material verification
Heat number traceability
PMI test
Chemical composition analysis
OD, wall thickness and length inspection
Straightness inspection
Surface inspection
Hydrostatic test
Eddy current test
Ultrasonic test for seamless pipe
Weld seam inspection for welded pipe
Mechanical testing
Flattening / flaring test when required
Final visual inspection
MTC EN 10204 3.1 / 3.2
Third-party inspection by SGS, BV, TUV or Intertek upon request
CFR
ISO9001
ROHS
Packing & Logistics
ASTM A312 stainless steel pipes are packed according to export seaworthy standards to reduce damage during handling, storage and international transportation.
Packing options include:
Pipe bundles with steel strips
Plastic caps for both ends
Waterproof plastic wrapping
Wooden cases for small diameter pipes
Wooden pallets or steel frame packing
Bundle labels and heat number marking
Customized shipping marks
Container loading support
Bulk vessel shipment for large quantity orders
Standard pipe markings can include material grade, standard, size, heat number, manufacturer name and order number.
Why Choose Xi'an Dongmeng Group Co., Ltd.?
Xi'an Dongmeng Group Co., Ltd. is a stainless steel pipe supplier serving global industrial buyers, EPC contractors, distributors and fabrication companies.
Our advantages:
ASTM A312 / ASME SA312 stainless steel pipe supply
TP304, TP304L, TP316, TP316L, TP321, TP347 and TP310S available
Seamless, welded and EFW pipe options
Custom cutting and pipe end preparation
MTC EN 10204 3.1 provided for export orders
PMI, hydrostatic testing, UT / ET and third-party inspection available
Project documentation support
Export seaworthy packing
Fast quotation based on buyer specification
Global delivery experience for industrial piping projects
How to Get a Fast Quotation
To help us quote accurately, please send the following details:
Material grade: TP304, TP304L, TP316L, TP321, TP347, etc.
Standard: ASTM A312 / ASME SA312
Pipe type: seamless or welded
Size: NPS / OD
Wall thickness: SCH 10S, SCH 40S, SCH 80S, etc.
Length: 6m, 12m or custom length
Quantity: meters, pieces or tons
Surface and pipe end requirement
MTC / third-party inspection requirement
Destination port or delivery terms
Our sales team will provide price, lead time, packing solution and technical support based on your project requirements.
FAQ
1. What is ASTM A312 stainless steel pipe?
ASTM A312 is a standard specification issued by ASTM International for seamless, welded, and heavily cold-worked austenitic stainless steel pipes intended for high-temperature and general corrosive service.
2. What grades are covered under ASTM A312?
Common grades include:
TP304 / TP304L
TP316 / TP316L
TP321
TP347
TP310S
Among them, TP316L is widely used for chemical and marine environments due to its superior corrosion resistance.
3. What is the difference between ASTM A312 TP304 and TP316?
The main difference is molybdenum (Mo) content:
TP304 – General corrosion resistance
TP316 – Contains 2–3% Mo, offering better resistance to chlorides and pitting corrosion
TP316 is preferred for seawater, chemical processing, and offshore applications.
4. What are the size ranges available?
Typical production range:
Outer Diameter (OD): 1/8" to 36" (6mm–914mm)
Wall Thickness: SCH 5S to SCH XXS
Length: 5.8m, 6m, 12m, or custom cut length
Custom dimensions are available for project requirements.
5. Is ASTM A312 pipe seamless or welded?
ASTM A312 covers:
Seamless (SMLS)
Welded (ERW / EFW)
Cold-worked welded pipe
Selection depends on pressure rating, application, and budget.
6. What tests are required under ASTM A312?
Standard inspection and testing include:
Hydrostatic Test or NDT
PMI (Positive Material Identification)
Chemical Composition Analysis
Mechanical Testing (Tensile, Hardness)
Flattening / Flaring Test
Mill Test Certificate (MTC EN 10204 3.1) is typically provided for export orders.
7. What industries commonly use ASTM A312 pipes?
Major industries include:
Oil & Gas
Petrochemical
Chemical Processing
Power Generation
Marine Engineering
Food & Beverage Processing
It is widely used in pressure piping systems.
8. What is the temperature range for ASTM A312 pipes?
Austenitic stainless steel pipes under ASTM A312 are suitable for:
Cryogenic service
High-temperature service up to 870°C (depending on grade)
TP310S performs better in extreme heat environments.
9. What surface finishes are available?
Common finishes include:
Annealed & Pickled (AP)
Bright Annealed (BA)
Polished (No.4, 180–600 grit)
Industrial piping usually uses pickled surface finish.
10. What certifications can be provided for export?
For international B2B buyers, suppliers typically provide:
EN 10204 3.1 / 3.2 MTC
ISO 9001 Certification
Third-party inspection (SGS, BV, TUV available upon request)
NACE compliance for sour service (if required)
learn more about ASTM A312
How To Read ASTM A312 Pipe Markings And Certification
Differences Between ASTM A312 TP304 And TP316 Stainless Steel Pipes
ASTM A312 Pipe Specifications: Dimensions, Wall Thickness, And Schedule Comparison
Understanding ASTM A312 Stainless Steel Pipes: TP304, TP304L, TP316, TP316L
ASTM A312 TP316L 2" To 24" Seamless Stainless Pipe Price Factors Explained
ASTM A312 TP304L Schedule 10S Stainless Pipe For Food Processing Industry
ASTM A312 TP316L 8" SCH 80 Stainless Pipe Export Packaging Standards
China ASTM A312 TP304 6 Inch Schedule 40 Stainless Steel Pipe Supplier Guide
ASTM A312 TP316L SCH 40 Stainless Pipe For Middle East Oil Projects
ASTM A312 TP316L 4-Inch SCH 10S Pipe Dimensions
ASTM A312 3 Inch Stainless Steel Pipe Wall Thickness & Tolerance Table
ASTM A312 TP304 SCH 80 Pressure Rating Calculation Guide
ASTM A312 TP316L Schedule 40 Pipe Weight Per Meter Chart
ASTM A312 Vs ASTM A106 Pipe: Dimension & Pressure Rating Comparison
ASTM A312 TP316L Vs ASTM A213 Tube: Schedule And Wall Thickness Comparison
ASTM A312 TP304 Vs ASTM A269 Pipe: Size And Application Differences
ASTM A312 TP316L EFW Pipe 24" To 48" Large Diameter Industrial Use
ASTM A312 TP304 Welded Stainless Steel Pipe SCH 40S Specification Guide
ASTM A312 TP316L Seamless Pipe 1" To 12" Size Range And Applications
10 Inch ASTM A312 TP310S Seamless Pipe Wall Thickness & Tolerance Explained
1/2" ASTM A312 TP304L Stainless Steel Pipe Dimensions And Pressure Rating
8 Inch ASTM A312 TP316 Stainless Steel Pipe SCH 80 – Oil & Gas Pipeline
6" ASTM A312 TP304 Stainless Steel Pipe SCH 10S – Weight & Dimension Chart
2 Inch ASTM A312 TP316L Stainless Steel Pipe SCH 40 Specification Guide
ASTM A312 TP347H SCH 80 Stainless Pipe For Power Plant Applications
ASTM A312 TP321 Schedule 40S Pipe For Heat Exchanger Projects
ASTM A312 TP310S SCH 10S Stainless Steel Pipe For High Temperature Service
ASTM A312 TP316L Schedule 80 Stainless Steel Pipe For High-Pressure Systems
ASTM A312 TP304 Schedule 40 Stainless Steel Pipe Specification & Applications
Hot Tags: astm a312 stainless steel pipe supplier | tp304 / tp316 seamless & welded pipe, China astm a312 stainless steel pipe supplier | tp304 / tp316 seamless & welded pipe manufacturers, suppliers, factory, ASTM A249 tp304, ASTM A790, ASTM A409 Welded Large Diameter Stainless Steel Pipe, ASTM A269 A269M Seamless And Welded, A358 TP316 EFW Pipes, ASTM A268
