ASTM A312 316L seamless pipes deliver zero-leakage performance in corrosive environments. Precision cold-drawn with electropolished ID (Ra<0.8μm), ideal for pharmaceutical transfer systems. Withstand 1500 PSI at 200°C. Complies with FDA CFR 177.2600 standards. PED and NACE certified for global projects. Buy stainless steel seamless pipes from China manufacturer Guangxin PipeTech. TP304L, S31803 seamless pipes offer corrosion resistance for industrial use. Get custom seamless pipe at competitive prices!
At Fujian Guangxin PipeTech Co., Ltd., we believe that product quality is the foundation of long-term cooperation and customer trust. We are committed to delivering high-performance seamless pipes that meet or exceed international standards through strict quality management and continuous improvement.
We implement a full-spectrum quality management system covering every stage of production:
Only certified and traceable raw materials are used, ensuring metallurgical consistency and compliance with standards.
Our manufacturing lines include cold drawing, cold rolling, heat treatment, straightening, and surface finishing, all operated under strict process control.
Each process is monitored in real time for dimensional accuracy, surface integrity, and mechanical stability.
Every pipe undergoes rigorous testing before shipment, including:
Hydrostatic test / Pressure test
Eddy current and ultrasonic testing (NDT)
PMI (Positive Material Identification)
Dimensional and visual inspection
Mechanical property and corrosion tests (as per request)
We provide full documentation with every order:
Mill Test Certificate (EN 10204 3.1 / 3.2)
Compliance with ASTM, ASME, EN, DIN, GB standards
Third-party inspection (BV, SGS, TUV) available upon request
Our quality team is trained regularly in line with international standards and best practices. We also maintain an internal feedback loop to:
Improve process efficiency
Reduce non-conformities
Optimize customer satisfaction
We offer a wide range of seamless pipe sizes to meet diverse application needs:
Outer Diameter (OD): 6 mm to 914 mm
Wall Thickness: 1 mm to 90 mm
Maximum Length: Up to 24 meters per piece
These dimensions cover most industrial requirements in oil & gas, chemical, power generation, marine, and construction sectors.
At Guangxin PipeTech, we understand that every project has unique specifications. That’s why we provide custom manufacturing services for seamless pipes with:
Non-standard dimensions (OD, wall thickness, or length)
Special alloys (e.g., 904L, duplex stainless steel, super duplex, 600 series, 800 series)
Custom tolerances and surface finishes
Specific end types: Plain, beveled, or threaded
Small batch production or prototyping
Our experienced engineering team can work closely with your technical staff to deliver pipes tailored to critical environments, such as:
High-temperature or high-pressure systems
Aggressive chemical media
Corrosion-prone offshore and subsea installations
We supply pipes in a wide selection of stainless steels and nickel alloys, including:
Austenitic Stainless Steel: 304, 316, 310, 321, 347
High-alloy Stainless: 904L
Duplex & Super Duplex: 2205, 2507
Nickel Alloys: 600 series (e.g., Inconel 600), 800 series (e.g., Incoloy 800H)
Our products are manufactured to meet:
Chinese GB standards
American ASTM/ASME standards
European EN/DIN standards
Third-party inspection and mill certificates (EN 10204 3.1 / 3.2) are available upon request.
| Technical Specifications | |
| Standard | ASTM A312 / EN 10216-5 |
| Size Range | OD: 6-300mm WT: 1-25mm |
| Tolerance | OD: ±0.5% WT: ±7.5% |
| Pressure Rating | 310 Bar @150°C |
| Certification | PED Cat.IV, EN 10204 3.2 |
Stainless Steel 316L Seamless Pipes
Metallurgical Composition:
316L (UNS S31603) features a carbon content capped at 0.03% to prevent carbide precipitation during welding. The alloy's corrosion resistance stems from its 16-18% chromium, 10-14% nickel, and critical 2.0-3.0% molybdenum additions. Nitrogen (0.10% max) enhances strength, while manganese (≤2.0%) improves hot workability. Phosphorus and sulfur are restricted to ≤0.045% and ≤0.030% respectively to minimize hot cracking risks. The "L" grade maintains intergranular corrosion resistance per ASTM A262 Practice E even after 650°C sensitization.
Mechanical Properties:
Solution-annealed at 1040-1100°C followed by water quenching, 316L achieves:
Tensile Strength: 485-515 MPa (ASTM A312)
Yield Strength: 170-205 MPa at ambient, retaining 310 MPa at 200°C
Elongation: 40% minimum in 2-inch gauge length
Hardness: 80 HRB maximum per ASTM A370
Charpy V-notch impact values exceed 100J at -196°C, qualifying it for cryogenic LNG service (ASME B31.3 Appendix A).
Manufacturing Process:
Pipes undergo rotary piercing of forged billets at 1200°C, cold drawing with up to 80% reduction, and solution annealing in hydrogen atmosphere furnaces. Final surface treatment includes pickling (HNO3/HF bath) or electropolishing to achieve Ra<0.8μm. Hydrostatic testing at 1.5x design pressure with mandatory PMI (positive material identification) via XRF.
Critical Applications:
Pharmaceutical: CIP/SIP systems compliant with ASME BPE-2022
Chemical Processing: Acetic acid reactors up to 50% concentration at 120°C
Marine: Seawater lift pumps with chloride tolerance to 5,000 ppm
Food Processing: Milk pasteurization lines meeting FDA CFR 177.2600
Standards Compliance:
PED Category IV • EN 10217-7 • NACE MR0103 • FDA 21 CFR 178.3620
