ASTM A312 TP304L Stainless Steel Industrial Pipe

Are you searching for industrial piping that complies with ASTM A312 standards, offers superior corrosion resistance and reliable performance, while simultaneously resolving challenges related to welding and dimensional precision?

Our ASTM A312 TP304L stainless steel industrial piping features a low carbon content (≤0.03%, in compliance with UNS S30403), effectively preventing intergranular corrosion following welding. We offer two options: seamless pipes and welded pipes. The TP304L seamless pipes, being free of weld seams, ensure superior overall strength in high-pressure industrial environments; conversely, the TP304L welded pipes offer exceptional cost-effectiveness, making them suitable for a wide range of general-purpose applications. Both variants fully comply with ASTM A312 and ANSI B36.19M standards. All pipes undergo solution annealing at temperatures ranging from 1040°C to 1100°C; this process completely eliminates internal stresses and ensures a uniform material microstructure, thereby guaranteeing stable performance across a broad temperature range of -200°C to 870°C.

Regarding dimensional tolerances and precision, we implement rigorous quality control measures: outer diameter tolerances are maintained within ±0.02–0.4mm, wall thickness tolerances within ±10%, straightness is kept to ≤0.5mm/m, and length tolerances do not exceed +10mm-fully satisfying the exacting requirements of high-precision industrial assembly.

 

Specification:

Specification	ASTM A312 / ASME SA312
Outside Diameter	1/2" To 48"
Schedule	SCH 5 To SCH XXS
Type	Seamless / ERW / Welded / Fabricated / CDW
Ends	Plain End, Beveled End, Threaded
Delivery Condition	Annealed and Pickled, Polished, Bright Annealed, Cold Drawn
Length	6M Or As Custom, Single Random, Double Random , Standard & Cut length

 

ASTM A312 Gr TP 304L pipe Chemical Composition

Grade	Carbon	Chromium	Manganese	Sulfur	Silicon	Phosphorus	Nickel
ASTM A312 TP304L	0.035	18.0-20.0	2	0.03	1	0.045	8.0-13.0

 

SA 312 TP 304L schedule 40 Pipe Mechanical Properties

Material	Yield Strength	Temperure	Tensile Strength	Heat	Elongation
	Ksi (MPa), Min.	Min.º F(º C)	Ksi (MPa), Min.	Treatment
ASTM A312 TP304L	25(170)	1900 (1040)	70(485)	Solution	35

 

Stainless Steel Solution Heat Treating Condition

ASTM A312
Grade	Annealing Requirement
TP304	1040℃min., Water Quenching
TP304L
TP316
TP316L

 

ASTM A312 TP304L Stainless Steel  Pipe Sizes, Dimensions & Tolerances

ASTM A312 TP304/ TP304L seamless pipes are generally furnished in sizes 1/2″ through 24″, while ASTM A312 TP304/ TP304L welded pipes are available from 1-1/2″ through 48″. The wall thicknesses shall be furnished in accordance with ASME B36.10M or ASME B36.19M.

NPS	*t/D	Tolerance, % from Nominal
1/8"~2.5"	All	+20.0	-12.5
3"~18"	≤5%	+22.5	-12.5
3"~18"	>5%	+15.0	-12.5
≥20" Wld.	All	+17.5	-12.5
≥20" smls	≤5%	+22.5	-12.5
≥20" smls	>5%	+15.0	-12.5

 

ASTM A312 TP304L Stainless Steel Pipe for Chemical Plants

We successfully resolved a critical challenge faced by a chemical plant: the facility had previously utilized standard 304 welded pipes, but these suffered leaks due to intergranular corrosion after just eight months of operation, forcing a shutdown of the production line. After switching to our ASTM A312 TP304L seamless pipes (specifications: Φ325×12mm), the service life of the piping system was significantly extended to 48 months-not only reducing maintenance costs by 72% but also completely eliminating the risk of future leaks.

All our products undergo 100% PMI (Positive Material Identification) testing and are subject to independent inspection by authoritative third-party agencies such as SGS. With a tensile strength of ≥485 MPa, a yield strength of ≥170 MPa, and an elongation of ≥35%, our products ensure the authenticity and reliability of all test data, while fully complying with international industrial standards.

 

Inspection & Tests
Visual examination, dimensional inspection, PMI chemical analysis, tensile test, flattening test, bend test, eddy-current test, etching test, radiographic examination (for welded pipes), intergranular corrosion test (upon request).

Packaging and Delivery

Item	Details
Package	Waterproof paper, edge protection, wooden pallets or crates
Loading Port	Tianjin, Qingdao, Shanghai, or any major Chinese seaport
Container Capacity	1×20ft: Max 25 Tons, Max 5.8m length 1×40ft: Max 25 Tons, Max 11.8m length
Delivery Time	7–15 working days depending on order quantity