ASTM A312 TP304L Stainless Steel Seamless Pipe
ASTM A312 TP304L is a low-carbon stainless steel pipe specification based on the widely used 304 austenitic stainless steel. GNEE offers ASTM A312 TP304L stainless steel pipe in seamless, welded, and ERW (electric resistance welded) forms, suitable for a wide range of applications from low-pressure pipelines to high-temperature systems. It features a smooth surface (available in grades 2B, BA, or No. 4 upon request) and precise dimensional tolerances (OD ±0.79 mm, wall thickness ±10%).
According to the ASTM A312 standard, TP304L steel pipe must undergo hydrostatic testing to verify its overall strength and leak-tightness, ensuring it will not leak or rupture under operating pressure. Eddy current testing can be used in lieu of hydrostatic testing upon request. Ultrasonic testing or radiographic testing are also available if additional testing is required.

Specification
| Specifications | : | ASTM A 312 / ASME SA 312 |
| Dimensions | : | ASTM, ASME and API |
| SS 347H Pipes | : | 1/2″ NB – 16″ NB |
| ERW 347H Pipes | : | 1/2″ NB – 24″ NB |
| EFW 347H Pipes | : | 6″ NB – 100″ NB |
| Size | : | 1/8″NB TO 30″NB IN |
| Specialized in | : | Large Diameter Size |
| Schedule | : | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Type | : | Seamless / ERW / Welded / Fabricated / LSAW Pipes |
| Form | : | Round, Square, Rectangular, Hydraulic Etc |
| Length | : | Single Random, Double Random & Cut Length. |
| End | : | Plain End, Beveled End, Treaded |
ASTM A312 TP304L Stainless Steel Seamless Pipe Chemical Composition
| SS GRADE | ASTM A312 CHEMICAL COMPOSITION % MAXIMUM | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| C | MN | P | S | SI | CR | NI | MO | TI | |
| TP304L | 0.035 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 | 8.0-13.0 | --- | --- |
ASTM A312 TP304L Stainless Steel Seamless Pipe Mechanical Properties
| SS GRADE | HEAT TREATMENT | Tensile Strength, min ksi [MPa] | Yield Strength, min ksi [MPa] |
|---|---|---|---|
| TP304L | Solution | 70 [484] | 25 [170] |
If you have project requirements for 304L stainless steel bright annealed tubes, please feel free to place an order. GNEE maintains a large inventory of popular products for your selection. These tubes can be processed into a variety of practical forms, including seamless and welded. For detailed chemical composition and free samples, please contact our factory today. We offer competitive pricing and excellent service.
Testing and Inspection
Forgings conforming to ASTM standards undergo a variety of tests and inspections, including thermal analysis, tensile testing, hardness testing, hydrostatic testing, magnetic particle inspection, liquid penetrant testing, macroetch testing, and Charpy impact testing.


Highest quality packaging and shipping
The package is packed with waterproof paper and steel strapping, which meets the standard export sea freight packaging requirements and is suitable for various modes of transportation or can be customized according to customer requirements.


Customer Visit


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