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Utilizing 26 high-precision cold rolling mills and 6 cold drawing machines, we ensure dimensional accuracy and superior mechanical properties.
ASTM A269 Seamless Stainless Tubing
ASTM A269 | TP304L / TP316L / TP321 / TP347 | General Corrosion-Resisting Service Grades
ISO 9001 | PED | ASME B31.3 | TS CertifiedRelated Products
Introduction
Among the most widely referenced and frequently specified standards in global stainless steel tubing procurement, ASTM A269 has established itself over decades of industrial application as the definitive specification framework governing the manufacture, testing, and quality assurance of seamless and welded austenitic stainless steel tubing for general corrosion-resisting and low-temperature service. ASTM A269 Seamless Stainless Tubing produced under this standard encompasses the full family of austenitic grades most commonly deployed in industrial instrumentation, general process piping, heat exchanger, and fluid handling applications — including TP304, TP304L, TP316, TP316L, TP321, TP347, and TP310S — providing engineers and procurement professionals with a single, internationally recognized standard framework that defines dimensional tolerances, chemical composition limits, mechanical property requirements, permissible heat treatment conditions, and mandatory testing protocols across the complete austenitic grade spectrum. The standard's emphasis on general service applicability — as distinct from the more specialized requirements of ASTM A213 (boiler and heat exchanger tubing) or ASTM A632 (small diameter precision tubing) — makes it the natural selection for the broad majority of industrial stainless tubing applications where the primary requirements are dimensional consistency, surface quality, corrosion resistance in aqueous and atmospheric environments, and chemical process compatibility at temperatures from cryogenic to approximately 870°C depending on the specific austenitic grade specified.
The dimensional scope of ASTM A269 seamless stainless tubing spans an exceptionally broad range, from precision small-bore tubing with outside diameters as small as 3.18mm (1/8 inch) and wall thicknesses as thin as 0.41mm, through the standard instrumentation and process tubing sizes most commonly used in industrial installations, to large-bore structural and process tubing with outside diameters reaching 76.2mm or larger in custom production. This dimensional breadth, combined with the standard's specification of two distinct dimensional tolerance classes — Class 1 (tighter tolerances for critical precision applications) and Class 2 (standard commercial tolerances for general service) — provides procurement engineers with the flexibility to specify the minimum tolerance level required by their application without over-specifying precision requirements that add cost without performance benefit. The standard mandates hydrostatic pressure testing or nondestructive electric testing for all tubes, providing assurance that every tube delivered is free from through-wall defects that would cause in-service leakage — a fundamental quality requirement for fluid-containing tubing in any application. The surface finish requirements of ASTM A269, specifying a smooth internal and external surface free from scale, suitable for the full range of corrosion-resisting service applications, are achieved through the combination of solution annealing in controlled atmosphere furnaces and either bright annealing (for a clean, oxide-free surface) or acid pickling and passivation (for a matte but fully passive surface) depending on the surface finish specified by the purchaser.
The grade selection within the ASTM A269 framework is the primary technical decision that determines the corrosion resistance, high-temperature performance, and weldability of the specified tubing for a given application. TP304L — the low-carbon variant of the standard 304 grade — is the most widely specified grade for general aqueous corrosion service, providing adequate corrosion resistance for a broad range of industrial fluids including mild acids, caustic solutions, and atmospheric environments without the sensitization risk associated with the standard TP304 grade in as-welded condition. TP316L adds the critical 2–3% molybdenum addition that raises pitting resistance equivalent from approximately 17 (TP304L) to approximately 23–25, providing meaningful improvement in chloride pitting resistance for marine atmosphere, saline process fluid, and pharmaceutical service environments. TP321, stabilized with titanium at a minimum of 5× carbon content, provides immunity to sensitization in heavy-gauge applications where the carbon content of standard grades would create sensitization risk under high heat input welding conditions that cannot be avoided in thick-wall tube fabrication. TP347, stabilized with niobium, provides similar sensitization immunity with superior resistance to polythionic acid attack in petroleum refinery service compared to TP321, making it the preferred stabilized grade specification for refinery heat exchanger and process piping applications.
Our ASTM A269 seamless stainless tubing program covers the complete grade and dimensional spectrum of the standard, with immediate stock availability for the most common combinations of grade, outer diameter, and wall thickness, and rapid production lead times for non-standard dimensions within the standard's scope. All tubing is manufactured through precision cold-drawing and pilgering processes, solution annealed in controlled atmosphere furnaces, and tested per ASTM A269 mandatory requirements including hydrostatic or nondestructive electric testing, flattening test, flare test (where applicable), and dimensional inspection. EN 10204 3.1 Mill Test Reports are standard, with chemical analysis, mechanical properties, and test results documented in full. Our technical team provides grade selection guidance, pressure-temperature rating calculations per ASME B31.3, and dimensional tolerance consultation for both standard and precision tubing applications, ensuring that ASTM A269 seamless tubing delivered to your facility fully meets the specification requirements of your most demanding corrosion-resisting and fluid-handling applications.
Specifications
| Available Grades | TP304/304L, TP316/316L, TP321, TP347, TP310S |
| Standard | ASTM A269 (Class 1 & Class 2) |
| Outer Diameter | 3.18mm - 76.2mm (Custom Larger Available) |
| Wall Thickness | 0.41mm - 8.0mm |
| Length | Up to 25000mm (Random or Fixed) |
| Finish | Bright Annealed or Pickled & Passivated |
Chemical Composition (TP316L)
| Element | C | Mn | Si | Cr | Ni | Mo | N |
| Value (%) | ≤0.030 | ≤2.00 | ≤0.75 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | ≤0.10 |
Multi-Grade AvailableClass 1 & 2 ToleranceHT or Pickled Finish
Mechanical Strength (TP316L)
Comprehensive Info
| MOQ | 100kg (Negotiable for stock) |
| Lead Time | 10 - 25 Days |
| Packaging | Plywood Crates / Straight Bundles |
| Certifications | ISO 9001, PED, ASME B31.3, TS |
| Raw Materials | Premium Global Austenitic Melt Sources |
| Customization | Grade, Class, OD/WT, Length, Surface Finish |
Applications
Process Instrumentation LinesImpulse tubing, sample lines, and analyzer connections in general chemical and petrochemical process plants
General Industrial Heat ExchangersTube bundles for aqueous and mild chemical service heat exchangers where A269 grade selection covers the process fluid requirements
Chemical Process Fluid LinesSmall-to-medium bore process piping for mild acid, caustic, and saline process fluid distribution in general chemical plant service
Pharmaceutical Process PipingTP316L bright annealed tubing for pharmaceutical process fluid transport and CIP/SIP cleaning system piping
Water Treatment Plant PipingDistribution and dosing tubing in municipal and industrial water treatment facilities requiring proven long-term corrosion resistance
Low-Temperature Cryogenic ServiceAustenitic grade tubing for liquid gas handling and cryogenic process equipment where low-temperature toughness is a design requirement
Advantages
Universal International Recognition
ASTM A269 is recognized and accepted by engineering specifications, inspection authorities, and end-user quality systems in over 80 countries — eliminating material re-qualification when projects cross international jurisdictions.
Two-Class Tolerance System
Class 1 precision tolerances (±0.05mm OD) for instrumentation and heat exchanger applications, Class 2 standard tolerances for general process tubing — specifying only the precision level the application requires without unnecessary cost premium.
Mandatory Integrity Testing
Every tube is 100% hydrostatically or eddy current tested per the standard — providing documented assurance of through-wall integrity that voluntary testing programs cannot match for procurement confidence.
Broad Stock Availability
The widest stocked dimensional range of any stainless tubing standard — rapid fulfillment for urgent instrumentation replacement, maintenance, and small-project requirements without extended production lead times.
About Jiangsu Jend Tube Co.,Ltd.
As China ASTM A269 Seamless Stainless Tubing Manufacturers and Wholesale ASTM A269 Seamless Stainless Tubing Factory, Established in 2011 and is a manufacturing enterprise with a complete manufacturing cycle from raw material selection to finished product delivery. The company currently has more than 100 employees, covers an area of 30015 square meters, and has a registered capital of 48 million yuan, annual production capacity of 3800 tons.
The company has passed ISO9001:2015 quality certification, domestic pressure vessel TS certification, and foreign pressure vessel PED certification. With rich experience and mature technology, we have been expanding our market internationally. At present, our products are exported to more than 50 countries and regions including Europe, America, Southeast Asia, and the Middle East.
The company adheres to different production norms and standards such as the American standard (ASTM), the European standard (EN), the German standard (DIN), the Japanese standard (JIS), the Russian standard (GOST), and the Chinese standard (GB).
Our company specializes in and customizes various specifications of Martensite TP410 (0Cr13, 1Cr13), Ferrite TP405 (1Cr13Al), TP430 (1Cr17), TP444 (0Cr18Mo2), TP439, TP409 (0Cr11Ti), It is also proficient in manufacturing Austenitic seamless stainless steel pipes of series such as TP304(L/H), TP316(L/H/Ti), TP310S, TP317, TP321(H) and TP347(H). Duplex such as S31803, S2205, S32750, S32304, and Nickel-based alloys Monel400, Monel600, Monel800, GH3030, 904L, Inconel 625, etc.
The company mainly produces seamless steel pipes with the following specifications: outer diameter: 3.18mm to 406.4mm, wall thickness: 0.3mm to 20mm, and the longest length is 25000mm. Additionally, it can customize seamless steel pipes with special materials and specifications according to customer requirements. The company attaches great importance to scientific innovation. The staff of the company vigorously develop technological research and development.
Jiangsu Jend Tube Co.,Ltd. will continuously accumulate professional knowledge and capabilities, striving to become a leader in the domestic market and even the world market. Strive to be the most reassuring pipe manufacturing enterprise for customers.
Precision Manufacturing and Process Optimization
We rely on precision equipment and optimized production technologies to achieve outstanding mechanical performance and consistent product quality.
Cold Rolling and Cold Drawing
Solution Heat Treatment
Natural gas solution treatment furnaces and BA solution treatment furnaces optimize the material's grain structure, enhancing corrosion resistance.
Precision Straightening and Polishing
10 straightening machines and 8 finishing polishing machines guarantee product surface smoothness and dimensional accuracy.
Automated Inspection and Quality Assurance
Real-time monitoring systems ensure the stable quality of every batch of products.
Product Usage Tips
Specifying the Correct Tolerance Class
Specify Class 1 (tighter OD tolerance ±0.05mm below 12.7mm OD) only when tube-to-fitting compression joint leak-tightness or heat exchanger tube-to-tubesheet joint quality genuinely requires this level of dimensional precision. For general process piping and structural applications, Class 2 standard tolerances are fully adequate and reduce procurement cost by eliminating the precision manufacturing premium associated with Class 1 production.
Grade Upgrade for Weld-Intensive Fabrication
When A269 tubing will be subject to multiple welding operations or high heat input welding — as in multi-pass orbital welding of heavy-wall instrumentation manifolds — specify TP316L rather than TP316, or TP321 rather than TP304/304L, to ensure sensitization risk is eliminated in the most thermally challenged HAZ regions without requiring post-weld solution annealing.
Compression Fitting Compatibility
For A269 tubing used with compression-type instrument fittings (Swagelok, Parker, etc.), verify that the specified wall thickness provides the minimum tube hardness required by the fitting manufacturer for reliable ferrule bite and joint seal formation. Excessively soft tube (over-annealed condition) may not develop sufficient ferrule bite depth for reliable seal at rated working pressure.
Passivation After Installation
After field cutting, threading, and installation of A269 stainless tubing systems, perform system passivation with 20–50% nitric acid solution at ambient temperature for 30–60 minutes to restore the passive chromium oxide film disrupted by cutting and mechanical operations. This step is particularly important for TP316L instrumentation systems in marine or high-chloride atmospheric environments where passive film integrity is critical to corrosion performance.
Value-Added Processing Services
We provide comprehensive processing services covering the full ASTM A269 grade and dimensional range:
Precision Cutting
Class 1 tolerance cutting to ±0.2mm for instrumentation and compression fitting assembly applications.
Hydrostatic & ET Testing
100% hydrostatic pressure testing and nondestructive electric testing per ASTM A269 mandatory requirements.
Bright Annealing
Controlled hydrogen atmosphere bright annealing for oxide-free surface finish in pharmaceutical and instrumentation applications.
End Preparation
Deburring, flaring, and flange preparation for direct instrumentation and process connection assembly.
Payment & Shipping
Payment Terms
- T/T (Telegraphic Transfer)
- L/C at Sight (Letter of Credit)
- Western Union
- Flexible terms for long-term partners
Shipping Options
- Sea Freight (FCL/LCL)
- Air Freight for urgent orders
- Express for small samples
- Seaworthy wooden cases or bundles with end caps
Certifications & Standards
Our ASTM A269 seamless stainless tubing is manufactured and certified to the full requirements of the standard across all grades:
ISO 9001:2015
PED Certification
ASME B31.3
ASTM A269 (Class 1 & 2)
TS Pressure Vessel
EN 10204 3.1 MTR
Frequently Asked Questions
What is the difference between ASTM A269 and ASTM A213?
ASTM A213 is specifically for boiler, superheater, and heat exchanger tubing with stricter mechanical property requirements at elevated temperature and mandatory grain size control for stabilized grades. ASTM A269 covers general corrosion-resisting and low-temperature service tubing with broader applicability across process, instrumentation, and general industrial service outside boiler and pressure vessel code applications.
What does "Class 1" versus "Class 2" mean in ASTM A269?
Class 1 specifies tighter OD tolerances (±0.05mm below 12.7mm OD, ±0.10mm for larger sizes) suitable for compression fitting assemblies and precision heat exchanger applications. Class 2 uses standard commercial tolerances (±0.10–0.15mm depending on size) adequate for general process piping and structural applications where precision fitting connections are not required.
Which grade should be specified for pharmaceutical process tubing under ASTM A269?
TP316L in the bright annealed finish is the standard pharmaceutical process tubing specification under ASTM A269. The 2–3% molybdenum provides adequate corrosion resistance for most pharmaceutical process fluids, and the bright annealed finish delivers the smooth, oxide-free surface required for CIP cleanability and passivation validation in FDA-regulated manufacturing environments.
Is ASTM A269 tubing suitable for cryogenic service?
Yes, all austenitic grades specified in ASTM A269 — including TP304L, TP316L, TP321, and TP347 — maintain excellent impact toughness and ductility at cryogenic temperatures to -196°C without the ductile-to-brittle transition that restricts ferritic and martensitic grades in low-temperature service. No special cryogenic heat treatment or additional testing is required for most A269 austenitic grades in cryogenic service.
Can TP321 and TP347 be substituted interchangeably under ASTM A269?
Both TP321 (Ti-stabilized) and TP347 (Nb-stabilized) are available under ASTM A269 and both prevent sensitization. TP347 is preferred for petroleum refinery service due to its better resistance to polythionic acid SCC, while TP321 may be preferred where titanium stabilization is specifically required by design codes. The grades are not typically substituted without engineering review.
Is hydrostatic testing mandatory for all ASTM A269 tubes?
ASTM A269 requires either hydrostatic pressure testing or nondestructive electric testing (eddy current) for every tube — the purchaser specifies which test is required, or both can be specified simultaneously. Hydrostatic testing verifies pressure-tightness; eddy current testing provides additional surface and subsurface defect detection. For critical instrumentation and process applications, specifying both tests provides maximum assurance.
What is the typical delivery lead time for standard ASTM A269 stainless tubing?
For the most common grade-dimension combinations (TP304L and TP316L in standard instrumentation and process sizes), delivery from stock is typically 10–20 days. Non-standard dimensions or less common grades (TP347, TP310S) require production lead times of 20–35 days. Class 1 tolerance production may add 5 days over Class 2 equivalent dimensions.
Do you supply ASTM A269 tubing with dual A269/EN 10216-5 certification?
Yes, dual ASTM A269 and EN 10216-5 certification is available for multinational project specifications requiring both American and European standard compliance. The dual certificate Mill Test Report documents compliance with both standards' chemical, mechanical, and testing requirements in a single document, simplifying project material qualification for international EPC contractors.
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