ASTM A778 TP316L Stainless Steel Pipe
ASTM A778 TP316L Stainless Steel Pipe
At Ganyeah Group, we specialize in manufacturing high-performance stainless steel piping solutions that meet international standards for quality, corrosion resistance, and durability. One of our flagship products is the ASTM A778 TP316L stainless steel pipe, engineered for use in environments where resistance to aggressive media is required but post-weld heat treatment is not necessary.
Product Specification Overview
Standard: ASTM A778
Grade: TP316L (UNS S31603)
Type: Welded, unannealed austenitic stainless steel
Form: Straight-seam or spiral butt seam pipe
Weld Process: Typically TIG or laser welding without filler metal
Heat Treatment: Not required unless specified by purchaser
Size Availability:
OD Range: 3″ to 48″ [75 mm to 1200 mm]
Wall Thickness: 0.062″ to 0.500″ [1.57 mm to 12.70 mm]
Note: Pipes outside this size range can be supplied upon request if they meet all other ASTM A778 requirements.
Chemical Composition of TP316L
| Element | Content (%) |
| Carbon (C) | 0.030 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 16.0 – 18.0 |
| Nickel (Ni) | 10.0 – 14.0 |
| Nitrogen (N) | 0.10 max |
316L’s enhanced molybdenum content (not listed here, but typically ~2.0–2.5%) provides superior resistance to chloride-induced pitting and crevice corrosion compared to 304L.
Mechanical Properties
| Property | Requirement |
| Tensile Strength (min) | 70 ksi [485 MPa] |
Additional mechanical testing (e.g., flattening, flange, or bend tests) may be performed based on contract or project requirements.
Manufacturing Advantages
TP316L pipes under ASTM A778 are not heat-treated after welding, which makes them a cost-effective choice for applications where annealing is not essential to meet corrosion performance. Ganyeah Group employs advanced welding technology to ensure smooth weld seams and dimensional accuracy, even without post-weld annealing.
All pipes undergo strict dimensional checks, visual inspections, and optional non-destructive testing based on customer specifications.Quality Assurance – By Ganyeah Group
ISO 9001-certified production
Full traceability from raw material to finished product
Optional third-party inspection and pressure testing
Marking and documentation per ASTM A778 and customer specifications
Custom fabrication available for lengths, surface finish (pickled, polished), or end types (plain, beveled)
Ordering Guidelines
Please specify the following when placing your order:
Pipe OD and wall thickness or NPS size
Length and surface condition
End finish (plain/beveled/threaded)
Supplementary tests (if required)
Marking and packaging requirements
Choose Ganyeah Group for Reliable Stainless Solutions
At Ganyeah Group, our commitment to stainless steel excellence extends beyond compliance — we deliver pipes built to perform and last. With global reach and a reputation for quality, we’re your trusted partner in demanding environments.
Contact us to request a quote or technical datasheet for ASTM A778 TP316L stainless steel pipes.