316L Stainless Steel Pipe - ASTM A312 Seamless/Welded Tubing

Kuaima Steel Co., Ltd.

Verified Custom manufacturer 7yrs

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Technical Specifications of 316L Stainless Steel Pipe

Property	Parameter	Description
Product Name	316L Stainless Steel Pipe	Low-carbon austenitic stainless steel pipe with superior corrosion resistance
Material Grade	316L / EN 1.4404 / UNS S31603 / JIS SUS316L	International grade equivalents
Standard Compliance	ASTM A312, ASTM A269, EN 10217-7, JIS G3459	Meets major international pipe standards
Carbon Content (C)	≤0.03%	Low carbon for improved weldability and corrosion resistance
Chromium (Cr)	16.0-18.0%	Provides excellent corrosion resistance
Nickel (Ni)	10.0-14.0%	Enhances ductility and toughness
Molybdenum (Mo)	2.0-3.0%	Improves pitting and crevice corrosion resistance
Manganese (Mn)	≤2.0%	Improves strength and workability
Silicon (Si)	≤1.0%	Deoxidizer and strengthener
Tensile Strength	≥515 MPa	Minimum tensile strength per ASTM A312
Yield Strength	≥205 MPa	Minimum yield strength at 0.2% offset
Elongation	≥35%	Ductility in 50mm gauge length
Hardness	≤217 HBW / ≤95 HRB	Maximum hardness values
OD Range	6mm - 914mm	Available outer diameter options
Wall Thickness	0.5mm - 50mm	Standard and custom thickness available
Length	5.8m - 12m or custom	Standard and custom lengths
Surface Finish	Bright Annealed (BA), Polished, Pickled	Multiple surface treatment options
Manufacturing Process	Seamless / Welded (TIG/ERW)	Hot-finished or cold-drawn seamless, or welded options
Application	Chemical processing, marine, pharmaceutical, food processing	Typical application industries
Temperature Range	-196°C to 925°C	Operating temperature range
Corrosion Resistance	Excellent in chloride environments	Superior to 304, PRE ≥24
Certification	EN 10204 3.1, ISO 9001, PED 2014/68/EU	Quality certifications provided
Packaging	Bundled with steel strips, plastic caps, wooden case	Standard export packaging
MOQ	500 kg	Minimum order quantity

316L Stainless Steel Pipe - ASTM A312 Seamless/Welded Tubing

316L stainless steel pipe represents a premium-grade austenitic chromium-nickel tubing solution engineered for superior corrosion resistance in demanding industrial environments. This low-carbon variant of 316 alloy finds extensive application in chemical processing, marine infrastructure, pharmaceutical manufacturing, and food production systems where exceptional resistance to chloride-induced pitting and crevice corrosion is paramount. Manufactured to ASTM A312/A312M standards, our 316L pipes serve critical roles in industries requiring both structural integrity and long-term durability against aggressive media.

What is 316L Stainless Steel Pipe?

316L stainless steel pipe is an austenitic chromium-nickel-molybdenum alloy tubing with carbon content limited to 0.03% maximum, specifically designed to eliminate carbide precipitation during welding operations. The "L" designation indicates this low-carbon modification, which maintains optimal corrosion resistance in heat-affected zones without requiring post-weld annealing. Containing 16-18% chromium, 10-14% nickel, and 2-3% molybdenum, this alloy demonstrates exceptional resistance to sulfuric, phosphoric, and acetic acids while maintaining mechanical strength across temperatures from cryogenic to 800°F (427°C).

316L Stainless Steel Pipe Technical Specifications

Our 316L pipes comply with ASTM A312/A312M-2021 Section 5 requirements, featuring density of 7.98 g/cm³ at 20°C and tensile strength of 515 MPa minimum per standard specifications. Chemical composition adheres to UNS S31603 designation with chromium 16.0-18.0%, nickel 10.0-14.0%, molybdenum 2.0-3.0%, and carbon ≤0.030%. Available in seamless (ASTM A312 TP316L) and welded configurations (ASTM A358 Class 1), our inventory spans NPS 1/8" through NPS 48" with wall schedules from 5S to XXS. Surface finishes include mill finish, 2B cold-rolled, and electropolished to Ra ≤0.4 μm for sanitary applications.

316L stainless steel pipe supplier

Why Choose Our 316L Stainless Steel Pipe

Our manufacturing process incorporates solution annealing at 1900-2050°F (1038-1121°C) followed by rapid water quenching, ensuring complete carbide dissolution and optimal corrosion resistance. Each production lot undergoes PMI verification, hydrostatic testing to 1.5x design pressure per ASME B31.3, and intergranular corrosion testing according to ASTM A262 Practice E. Mill test certificates document full chemical analysis, mechanical properties, and heat treatment parameters traceable to original melt numbers. Our 316L pipes meet EN 10088-2:2014 Grade 1.4404 and JIS G3459 SUS316L equivalencies for international project compliance.

Superior Welding Characteristics

The reduced carbon content of 316L eliminates sensitization risks during multi-pass welding, making it the preferred choice for fabricated piping systems requiring extensive field welding. Compatible with GTAW, GMAW, and SMAW processes using ER316L filler metals, our pipes maintain corrosion resistance across all heat-affected zones without mandatory stress-relief annealing.

Enhanced Molybdenum Content Benefits

The 2-3% molybdenum addition provides superior resistance to chloride stress-corrosion cracking compared to 304L alternatives, with pitting resistance equivalent number (PREN) of approximately 24-26. This elevated PREN value ensures reliable performance in coastal atmospheric exposure, brackish water systems, and chloride-contaminated process streams.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard MOQ is 500 kilograms for stock sizes with mill-direct pricing available for orders exceeding 5 metric tons. Custom dimensions require minimum 2-ton orders with 8-10 week lead times from mill scheduling. Sample lengths up to 1 meter are available for material qualification testing at nominal handling charges.

Do you provide material test certificates?

Yes, we supply EN 10204 Type 3.1 mill test certificates with every shipment, documenting chemical composition per heat analysis, mechanical properties from actual test specimens, heat treatment parameters, and hydrostatic test results. Supplementary PMI reports, intergranular corrosion test data per ASTM A262, and dimensional inspection records are available upon request to meet project QA/QC requirements.

316L stainless steel pipe wholesale

What is the typical delivery time?

Stock sizes in schedules 10S through 40S with NPS 1/2" to NPS 12" ship within 5-7 business days from our regional distribution centers. Non-stock dimensions require 6-8 weeks for seamless production or 4-6 weeks for welded configurations, subject to mill capacity. Expedited processing is available for critical-path projects with premium scheduling fees.

Can you cut to custom sizes?

Our fabrication facility provides precision cutting services with tolerances of ±1.5mm using abrasive saws or orbital cutting equipment to prevent heat-affected zone contamination. We offer beveling to ASME B16.25 specifications, end-facing, and deburring services. Custom lengths from 100mm to 12 meters can be processed with certified dimensional reports and end-marking per customer specifications.

Get a Competitive Quote for 316L Stainless Steel Pipe

Request your detailed quotation today and benefit from our mill-direct sourcing relationships, eliminating intermediary markups while ensuring full material traceability. Our technical sales team provides professional consultation on material selection, specification compliance, and cost optimization for your specific application requirements. Volume pricing structures and scheduled delivery programs are available for annual contracts and multi-phase projects.

24/7 customer support available via phone, email, and online chat
Free samples for quality evaluation with certified test reports
Competitive pricing for bulk orders with flexible payment terms
Professional technical consultation on alloy selection and application engineering

Contact us today to get your free quote within 24 hours!

316L stainless steel pipe manufacturer

Ratings & Reviews

5.0

Very satisfied

Based on 10 reviews for verified purchases

Supplier service

5.0

On-time shipment

5.0

Supplier service

5.0

Wei Chen

Singapore

verified purchases

2025-07-18

Excellent 316L Welded Pipes for Multi-Project Supply
Outstanding partner for our regional distribution business serving Southeast Asian contractors. This is our 5th container order in 8 months totaling over 85 tons of various 316L configurations. Latest shipment included 20 tons of mixed sizes (NPS 2 through NPS 10, Schedules 10S and 40S) for our stock inventory serving chemical, marine, and food processing customers. Quality consistency across different production runs has been excellent - all material meets ASTM A312 with proper chemical composition and surface finish. Their flexible approach to mixed-size container loading optimizes our inventory management. They provide individual heat number tracking even for consolidated shipments which is critical for our traceability requirements. Mill test certificates are well-organized by size and heat number, making customer distribution efficient. Technical support team has helped several of our customers with material selection and welding procedure questions. Pricing remains competitive with reliable delivery schedules averaging 22-25 days port-to-port. Their understanding of export documentation and Asian market requirements makes them an ideal supply partner for our distribution business.

Chris Martin

Canada

verified purchases

2025-08-26

Acceptable Quality with Documentation Issues Resolved
Decent product overall, some documentation issues were resolved satisfactorily. We ordered 6 tons of 316L welded pipe (NPS 4, Schedule 40S) for our mining process water system. Material quality met ASTM A312 requirements with proper chemical composition (carbon 0.027%, molybdenum 2.5%). Initial shipment arrived with incomplete mill test certificates - two heat numbers were missing mechanical test data. We contacted their quality department and they provided the complete documentation within 48 hours along with supplementary PMI reports at no charge. The replacement certificates showed all properties were within specification. Hydrostatic testing had been performed but wasn't clearly documented in the original MTCs. After resolution, we were able to proceed with our project QA approval. Suggestion for improvement: implement better quality control checks on documentation completeness before shipment to avoid delays in project schedules. Material itself performed well in our application with no corrosion issues after 6 months of brackish water service. Would order again but will verify documentation completeness upon delivery.

John Smith

United States

verified purchases

2025-09-01

Superior 316L Seamless for Pharmaceutical Clean Rooms
Long-term supplier for our pharmaceutical manufacturing facilities. This is our 9th order over 22 months covering multiple plant expansions across three states. Consistency in quality and documentation has been exceptional throughout our partnership. Latest shipment was 14 tons of 316L seamless pipe (NPS 1, NPS 1.5, NPS 2 in Schedule 10S) with bright annealed finish for our new sterile processing clean rooms. Surface finish quality averaged Ra 0.28 μm, exceeding our Ra 0.4 μm specification. Every heat lot included complete ASTM A262 Practice E testing showing no intergranular attack, critical for our high-purity water systems. Their technical team provided valuable input on orbital welding parameters and purge gas requirements that improved our installation quality. They maintain detailed records of our specification requirements which eliminates repetitive technical reviews for each order. Pricing has remained stable with volume discounts appropriately applied. Looking forward to continued partnership as we expand to two additional facilities next year.

William Taylor

Australia

verified purchases

2025-09-20

Solid 316L Pipes for Coastal Infrastructure
Good value for coastal marine applications. We compared quotes from 5 suppliers across Australia and Southeast Asia, and their price was 15% lower than Australian suppliers while maintaining AS 1528.1 equivalency to ASTM A312. Ordered 10 tons of 316L welded pipe (NPS 6 and NPS 8, Schedule 40S) for our coastal wastewater treatment plant upgrade. Material quality was good with PREN values documented at 25-26, suitable for our brackish water exposure. Mill test certificates were complete with full chemical analysis and mechanical testing. One minor issue was that the pipe marking ink was less durable than expected and faded during outdoor storage, but this didn't affect material traceability as we had already recorded all heat numbers. Delivery took 28 days which met their quoted timeframe. Overall, reliable supplier with competitive pricing for large diameter welded pipe. 4 stars because marking durability could be improved for projects with extended outdoor storage periods.

Carlos Silva

Brazil

verified purchases

2025-10-09

Perfect Quality for Food Processing Equipment
Long-term partner for stainless steel piping and tubing. This is our 6th order over the past 14 months for various food processing and dairy equipment projects. Consistency has been outstanding - every shipment has met ASTM A312 specifications with complete documentation and proper surface finish. Latest order was 5 tons of 316L seamless pipe (NPS 2, Schedule 10S) with electropolished finish to Ra 0.35 μm for our new dairy processing line. The electropolish quality is exceptional with uniform surface brightness and complete removal of surface contamination. Their understanding of 3-A Sanitary Standards and FDA compliance requirements saves us significant time in material qualification. They also provided welding procedure recommendations for orbital GTAW that helped our fabrication team achieve consistent root penetration. Pricing remains competitive even as our order volumes have increased. Looking forward to continued partnership for our upcoming beverage plant project.

Ahmed Al-Hassan

UAE

verified purchases

2025-10-28

Reliable 316L Supply for Petrochemical Expansion
Good experience overall for our petrochemical plant expansion. We compared quotes from 4 suppliers in UAE and Asia, and their pricing was competitive at 8% below the local market while offering better payment terms. Ordered 18 tons of 316L welded pipe (NPS 10 and NPS 12, Schedule 20) for our process water system. Material quality met ASTM A312 requirements with proper chemical composition and mechanical properties. PMI testing confirmed molybdenum content at 2.3-2.6% across all heats. Delivery took 38 days, which was 5 days longer than initially quoted due to customs clearance delays, but they kept us informed throughout. The pipes arrived in good condition with proper end protection. Overall, solid supplier with good technical knowledge and fair pricing. 4 stars because delivery was slightly delayed, though this was partially due to logistics beyond their control.

Robert Brown

United Kingdom

verified purchases

2025-11-17

Premium 316L Pipes for North Sea Platform
We ordered 22 tons of 316L seamless pipe in mixed sizes (NPS 3, NPS 4, NPS 6, all Schedule 40S) for our North Sea platform retrofit project. Quality assessment showed exceptional material properties: tensile strength averaged 545 MPa (well above the 515 MPa minimum), and elongation values were 48-52%. Material certificates documented solution annealing at 1950°F with rapid water quench, ensuring complete carbide dissolution. We conducted our own PMI verification on 10% of the shipment and all readings matched the mill certificates perfectly. The low carbon content (0.019-0.026% across different heats) eliminates any sensitization concerns for our extensive field welding requirements. Surface condition was outstanding with uniform mill scale that removed cleanly during pickling. This is our 2nd major order for offshore applications. Their understanding of marine corrosion requirements and NORSOK compliance is excellent. Highly recommended for critical offshore and subsea piping systems.

Hans Mueller

Germany

verified purchases

2025-12-08

Good Value 316L Welded Tubing for Chemical Plant
Good value for the price. We compared quotes from 6 suppliers across Europe and Asia, and their price was 12% lower than the European average while maintaining ASTM A312 compliance and proper mill certification. Ordered 15 tons of welded 316L pipe (NPS 8, Schedule 10S) for our sulfuric acid handling system. Material quality was solid with complete chemical analysis showing chromium at 17.2% and nickel at 12.8%. The only minor issue was that 3 pipes had slight dents from shipping, but they quickly arranged replacement sections at no charge within 5 days. Hydrostatic test reports were complete and properly documented. Overall, reliable supplier with competitive pricing and responsive customer service. 4 stars because the initial packaging could have been more robust for international shipping, but their problem resolution was professional.

James Wilson

United Kingdom

verified purchases

2025-12-23

Outstanding Service and Technical Support
Excellent service experience from initial inquiry to final delivery. Communication: Their technical sales team provided detailed guidance on selecting between seamless and welded options for our pharmaceutical clean-room piping system. Responded to all technical questions within 2 hours with supporting documentation including welding procedure specifications for ER316L filler metals. Delivery: 12-ton order of NPS 2 and NPS 4 pipes (electropolished to Ra 0.3 μm) arrived in 19 days, exactly as promised. Packaging: Each pipe individually wrapped in PE film with wooden crate protection. End caps were secure and all marking was clear and permanent. EN 10204 Type 3.1 certificates were organized by heat number with complete traceability. Their quality documentation exceeded our QA requirements and saved us significant time during project qualification. Will definitely use them for our upcoming expansion project.

Michael Chen

Singapore

verified purchases

2026-01-07

Excellent 316L Seamless Pipes for Desalination Project
We ordered 8 tons of 316L seamless pipe (NPS 6, Schedule 40S, 6-meter lengths) for our seawater desalination plant expansion. Material certificates showed carbon content at 0.024% and molybdenum at 2.4%, fully compliant with ASTM A312 TP316L. We conducted intergranular corrosion testing per ASTM A262 Practice E and all samples passed without grain boundary attack. Surface finish was excellent mill finish with no visible pitting or surface defects. The PREN value documentation confirmed 24.8, perfect for our chloride-rich environment. Delivered in 11 days, 4 days ahead of the quoted schedule. This is our 4th order from this supplier over 18 months. Quality and documentation have been consistently excellent. Highly recommended for marine and chemical processing applications.