On June 3, 2025, we received an inquiry request from a new customer in China for a batch of ASTM A312 TP316L stainless steel pipe. The customer has strict requirements on the specifications, tolerances, surface quality and third-party testing and certification of the steel pipes, and focuses on the corrosion resistance and delivery cycle of the products.
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
| Processing Method | Seamless and Welded |
| Size Range | 1/8” – 30” / DN6 – 750 |
| Thickness Schedule | SCH 10S- SCH 160, XXS |
| Length | 6m or 12 m or Random |
| Standard | ASME B36.19 |
| Surface Treatment | Polish , Mirror , Epoxy Powder FBE, 2PE, 3PE Coating |
| Material Grade | ASTM A312 TP304/304L/304H, 316/316L, 310S, 317, 347, 904L, S32205, S31803, 32750, 32760, S32550 |
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
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | Mo |
| ASTM A312 TP316L | MIN | 10.00 | 16.00 | 2.00 | |||||
| MAX | 0.035 | 2.00 | 0.045 | 0.030 | 1.00 | 14.00 | 18.00 | 3.00 |
ASTM A312 TP316L Seamless Pipe Mechanical Property
| MATERIAL | T.S (MPA) | Y.S (MPA) | EL % |
| ASTM A312 TP316L | 485 min | 170 min | 35 min |
Stainless Steel Seamless Pipe Dimension
| Stainless Steel Pipe (ASME B 36.19M) | ||||||||||
| Nominal Size | OD | Sch5s | Sch10s | Sch40s | Sch80s | |||||
| DN | NPS | 0 | T | kg/m | T | kg/m | T | kg/m | T | kg/m |
| 6 | 1/8 | 10.3 | 1.24 | 0.28 | 1.73 | 0.37 | 2.41 | 0.47 | ||
| 8 | 1/4 | 13.7 | 1.65 | 0.49 | 2.24 | 0.63 | 3.02 | 0.8 | ||
| 10 | 3/8 | 17.1 | 1.65 | 0.63 | 2.31 | 0.84 | 3.2 | 1.1 | ||
| 15 | 1/2 | 21.3 | 1.65 | 0.82 | 2.11 | 1 | 2.77 | 1.27 | 3.73 | 1.62 |
| 20 | 3/4 | 26.7 | 1.65 | 1.04 | 2.11 | 1.28 | 2.87 | 1.69 | 3.91 | 2.2 |
| 25 | 1 | 33.4 | 1.65 | 1.33 | 2.77 | 2.09 | 3.38 | 2.5 | 4.55 | 3.24 |
| 32 | 1 1/4 | 42.2 | 1.65 | 1.68 | 2.77 | 2.7 | 3.56 | 3.39 | 4.85 | 4.47 |
| 40 | 1 1/2 | 48.3 | 1.65 | 1.95 | 2.77 | 3.11 | 3.68 | 4.05 | 5.08 | 5.41 |
| 50 | 2 | 60.3 | 1.65 | 2.44 | 2.77 | 3.93 | 3.91 | 5.44 | 5.54 | 7.48 |
| 65 | 2 1/2 | 73.0 | 2.11 | 3.77 | 3.05 | 5.26 | 5.16 | 8.63 | 7.01 | 11.41 |
| 80 | 3 | 88.9 | 2.11 | 4.6 | 3.05 | 6.45 | 5.49 | 11.29 | 7.62 | 15.27 |
| 90 | 31/2 | 101.6 | 2.11 | 5.29 | 3.05 | 7.4 | 5.74 | 13.57 | 8.08 | 18.63 |
| 100 | 4 | 114.3 | 2.11 | 5.96 | 3.05 | 8.36 | 6.02 | 16.07 | 8.56 | 22.32 |
| 125 | 5 | 141.3 | 2.77 | 9.67 | 3.4 | 11.57 | 6.55 | 21.77 | 9.53 | 30.97 |
| 150 | 6 | 168.3 | 2.77 | 11.55 | 3.4 | 13.48 | 7.11 | 28.26 | 10.97 | 42.56 |
| 200 | 8 | 219.1 | 2.77 | 15.09 | 3.76 | 19.96 | 8.18 | 42.55 | 12.7 | 64.64 |
| 250 | 10 | 273.1 | 3.4 | 23.08 | 4.19 | 27.78 | 9.27 | 60.31 | 12.7 | 96.01 |
| 300 | 12 | 323.9 | 3.96 | 31.89 | 4.57 | 36 | 9.53 | 73.88 | 12.7 | 132.08 |
| 350 | 14 | 355.6 | 3.96 | 35.06 | 4.78 | 41.3 | ||||
| 400 | 16 | 406.4 | 4.19 | 42.41 | 4.78 | 47.29 | ||||
| 450 | 18 | 457.2 | 4.19 | 47.77 | 4.78 | 53.26 | ||||
| 500 | 20 | 508 | 4.78 | 60.46 | 5.54 | 68.61 | ||||
| 550 | 22 | 558.8 | 4.78 | 66.57 | 5.54 | 75.53 | ||||
| 600 | 24 | 609.6 | 5.54 | 84.16 | 6.35 | 94.45 | ||||
| 750 | 30 | 762 | 6.35 | 120.72 | 7.92 | 147.36 | ||||
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.