ASTM/AISI/DIN/JIS 201/304/316/409/410/430/316L/304L Stainless Seamless Pipes for Industry, Construction & Plumbing

• Customization: Available
• After-sales Service: 1 Year
• Warranty: 1 Years
• Model NO.: 201/304/316/409/410/430/316L/304L SS SMLS PIPE
• Certification: CE, ISO, RoHS
• Application: Heater, Cooler, Condenser, Heat Exchanger
• Principle: Regenerative Heat Exchanger
• Style: U Tube
• Material: Stainless Steel
• Steel Grade: TP304/316/321/347
• Standard: ASME SA213-2018
• Shape: Round/Customized
• Process: Polished/Solution Treatment
• Condition: Hot Finished/Cold Finished
• End: Plain End/Bevel End
• Test: Et,Ut,PT,Ht
• Stock: Size Can Customized
• Processing: Customized
• Thickness: 1-150mm
• Used: Factory, Decoration, Food
• Packing: Standard Export Packing
• Delivery Time: 10-30 Working Days
• Size: as Per Client′s Design
• Selling Units: Single Item
• Transport Package: Woven Bag/Wooden Case
• Specification: SCH 5S-SCH160
• Trademark: EZS
• Origin: China
• Production Capacity: 10000 Ton/Year

Product Description

Product Description

  

1. Standard:
   These seamless stainless steel pipes are typically manufactured to international standards, including:
   ASTM A312 (for austenitic grades like 304, 316).
   ASTM A268 (for ferritic/martensitic grades like 409,410).
   ASME SA-312 (code-stamped versions for pressure vessel applications).
    
2. Dimensional Specifications:

•  
  Packaging and Delivery:
• Tubes are bundled with steel straps, separated by non-abrasive material to prevent scratches.
• Ends are capped with plastic protectors to avoid contamination during transit.
• Bulk orders packed in wooden crates or steel frames; small quantities in pallets with weatherproof wrapping.
• Shipped with MTRs, certification documents, and dimensional inspection reports for traceability and customer verification.
• 
  
  Application Scenarios:
• Boilers: Water wall tubes, superheater tubes, and economizer tubes in thermal power plants.
• Heat Exchangers: Shell-and-tube exchangers in chemical processing, oil refining, and HVAC systems.
• Superheaters/Reheaters: High-temperature steam lines in power generation.
• Condensers: Cooling water tubes in marine and industrial condenser units.
• 
  Chemical Composition Analysis:
• Austenitic Grades (TP304): Cr (18-20%), Ni (8-10.5%), C (≤0.08%), ensuring ductility and corrosion resistance.
• Low-Carbon Variants (TP304L): C (≤0.03%) prevents carbide precipitation during welding, maintaining corrosion resistance.
• Mo-Alloyed (TP316): Mo (2-3%) enhances resistance to chloride-induced pitting, ideal for coastal or chemical environments.
• Alloy T91: Cr (8-9.5%), Mo (0.85-1.05%), V (0.18-0.25%) for high-temperature strength and creep resistance.
• 
  Quality Assurance:
• Testing Protocols: Mandatory hydrostatic testing at 3.45 MPa (500 psi) for 10 seconds to verify leak tightness.
• Non-Destructive Testing (NDT): Eddy current testing for surface defects; ultrasonic testing for internal flaws in critical applications.
• Mechanical Testing: Tensile, yield, and elongation tests per ASTM E8; hardness testing (Rockwell B for austenitic, Rockwell C for alloys).
• Heat Treatment: Annealing for austenitic grades to relieve stress; normalizing and tempering for alloy grades (e.g., T91) to enhance strength.
• Performance Advantages:
• High-Temperature Stability: Austenitic grades (e.g., TP347) resist oxidation and creep at 600-650°C; ferritic-alloy T91 excels in 550-650°C steam environments.
• Corrosion Resistance: Alloying elements (Cr, Ni, Mo) protect against corrosive media (acids, salts, steam condensate), extending service life.
• Efficient Heat Transfer: Seamless construction and smooth surface minimize thermal resistance, enhancing heat exchange rates in boilers and heat exchangers.
• Formability: Excellent ductility allows bending into U-shapes, coils, or custom configurations without cracking, optimizing space in compact equipment.
•  
• OD Tolerance: ±0.05 mm for precision applications, ensuring uniform fluid flow and fit in tube sheets.
• WT Tolerance: ±10% of nominal thickness, critical for maintaining pressure integrity and heat transfer efficiency.
• Straightness: ≤1.6 mm per meter (0.063 in per 3 ft) to facilitate installation in heat exchanger bundles.
• U-Bend Specifications: For U-tubes, radius ranges from 1.5×OD to 5×OD, with wall thickness reduction ≤15% post-bending.

Chemical Composition

ASTM A213 covers various grades of stainless steel, such as TP304, TP316, etc. Here are the chemical compositions of some common grades (in wt.%):

 

Grade	C	Mn	Si	P	S	Cr	Ni	Mo	N	Other Elements
TP304/304L	≤0.08	≤2.00	≤1.00	≤0.045	≤0.030	18.0 - 20.0	8.0 - 11.0	-	-	-
TP316/316L	≤0.08	≤2.00	≤1.00	≤0.045	≤0.030	16.0 - 18.0	10.0 - 14.0	2.0 - 3.0	-	-
TP317/317L	≤0.08	≤2.00	≤1.00	≤0.045	≤0.030	18.0 - 20.0	11.0 - 15.0	3.0 - 4.0	-	-
TP347/347H/347HFG	≤0.08	≤2.00	≤1.00	≤0.045	≤0.030	17.0 - 19.0	9.0 - 13.0	-	-	Nb: 0.20

 

The typical mechanical properties of some common grades are as follows:

 

Grade	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)
TP304/304L	≥515	≥205	≥35
TP316/316L	≥515	≥205	≥35
TP317/317L	≥515	≥205	≥35
TP347/347H/347HFG	≥515	≥205	≥35
TP444	≥485	≥275	≥20

 

Technical Details

 

Processing of Production

 

Detailed Photos

Packaging & Shipping

FAQ