ASTM A312 TP316 Welding Stainless Exhaust Pipe

GNEE exports high-quality stainless steel products to over 60 countries. If you are in search of ASTM A312 TP316 stainless steel pipes applied in chemical, oil and gas industries, we are capable of delivering professional and high-quality solutions for you.

The ASTM A312 TP316 stainless steel pipes we manufacture contain 10.0–14.0% nickel (Ni), carbon (C) no more than 0.08%, and 2.00–3.00% molybdenum (Mo). They feature excellent toughness and welding stability, enabling stable continuous operation at temperatures up to 800 °C and a maximum intermittent oxidation-resistant service temperature of 870 °C, delivering outstanding high-temperature resistance. In addition, our stainless steel pipes undergo solution heat treatment (soaking at 1040–1120 °C followed by rapid water quenching). This process dissolves carbides precipitated in welds and relieves welding residual stress, so the welds are resistant to deformation and loosening under alternating high-temperature working conditions. In the neutral salt spray test with continuous spraying of 5% NaCl solution, TP316 shows no obvious pitting corrosion within 72 hours, demonstrating premium corrosion resistance.

We adopt internal and external weld leveling and milling as a standard factory process to thoroughly remove weld reinforcement on both sides of the weld. This leaves the inner pipe wall smooth, significantly cuts fluid transportation resistance and effectively prevents medium deposition, making the pipes ideally suited for clean conveying applications such as desalination circulation systems, fine chemical production, and the food and pharmaceutical industries. Meanwhile, the leveled welds undergo professional pickling and passivation uniformly to eliminate oxide layers formed by welding heat and form an even, dense protective passive film.

According to customers' diverse requirements, we also provide customized surface treatment and end cutting services, including pickling, polishing, bright annealing and bevel cutting, etc.

ASTM A312 TP316 ss pipe

ASTM A312 TP316 pickled pipes

ASTM A312 TP316  polished pipes

If you need help specifying material for a project, please share:

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Specification Chart of ASTM A312 TP316 Welded Pipe

A312 TP316 sS tube Chemical Composition

Element	Composition
C	≤0.08%
Mn	≤2.00%
P	≤0.045%
S	≤0.030%
Si	≤1.00%
Cr	16.0-18.0%
Ni	10.0-14.0%
Mo	2.00-3.00%

 

A312 TP316 sS tube Mechanical Properties

Tensile Strength min. MPa [ksi]	515 [75]
Yield Strength min. MPa [ksi]	205 [30]
Elongation in 2", min, % (*L)	35
Elongation in 2", min, %(*T)	25

 

ASTM tp316 Stainless Steel Pipe Tolerances

4mm to 35mm	+/- 0.08mm
35mm to 38mm	+/- 0.15mm
38mm to 60mm	+/- 0.20mm
60mm and above	+/- 0.25mm

 

Stainless Steel tp316 Welded Tubes Equivalent

Type	UNS	JIS	EN/DIN	EN/BS	EN/NF	ISO	GB
316L	S31603	SUS316L	X2CrNiMo18-14-3	316S13	X2CrNiMo17-12-2	19	00Cr17Ni14Mo2

 

tp316 sS Tubes Key Industries & Uses

Marine Engineering	Seawater pipelines, offshore platforms
Chemical Processing	Acid/alkali transport, reactors
Pharmaceutical	Bioreactors, ultra-pure fluid lines
Oil & Gas	Downhole tubing, heat exchangers

 

If you need more help, please share:

Whether you need seamless or welded pipe

The required size (NPS) and schedule/wall thickness

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Quality Control of ASTM A312 TP316 SS Welded Pipes

We support on-site testing of parameters such as outer diameter, wall thickness, and chemical composition. Additionally, we provide product quality reports, EN 10204 3.1 and 3.2 Material Test Certificates (MTC), and more.

outer diameter inspection

 chemical composition inspection

wall thickness inspection

To learn more about our product testing procedures, please click the link below for a quick overview.

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export-grade packaging

Our 316 stainless steel pipes are prepared with standard export packaging-utilizing wooden crates or boxes, plastic wrapping, and rubber end caps-to ensure protection against damage during transit. Each package is clearly marked with the company logo, material grade, dimensions, and batch number.

waterproof package

wooden crate

plastic end cap

Customer Cases

GNEE exports  A312 TP316  welded pipes to Saudi Arabia for a pipeline project at a desalination plant featuring high chloride concentration in water and severe salt spray corrosion. No pitting corrosion or leakage has occurred on the pipelines since the project was put into operation, and the customer placed a repeat order of the same specifications in 2026.

1.Which type of stainless steel pipe has higher strength, 304 or 316?

Stainless steel 316 is slightly stronger than grade 304, primarily due to the addition of 2% to 3% molybdenum in its chemical makeup. While their tensile and yield strengths at room temperature are very close, grade 316 maintains better mechanical strength and creep resistance at higher temperatures.

2.How to tell whether my stainless steel pipes are 304 or 316?

You can check the laser-etched or stamped grade markings, or use a professional X-ray fluorescence metal analyzer to distinguish between 304 and 316 stainless steel pipes.

3.How to weld 316 stainless steel pipes?

Welding 316 stainless steel requires matching filler metals like ER316L, strict surface cleanliness, and tight heat control to prevent warping and corrosion.

4.What maintenance practices maximize the service life of TP316 piping in coastal environments?
Regularly rinse surfaces with fresh water to remove salt deposits, inspect weld seams for undercut, and apply a mild nitric‑citric passivation treatment annually. These steps prevent pitting and crevice corrosion, extending service life by over 20 years.

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