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  • TOBO STEEL GROUP CHINA
    Brazil---Aimee
    In the latest vendor rating, TOBO won the excellent rating, it is good, will continue to cooperate.
  • TOBO STEEL GROUP CHINA
    Thailand ---Dave Mulroy
    ASTM A213 T9 Alloy steel pipe ,Stable quality , good price, excellent serive, TOBO GROUP is our trustworthy partner .
  • TOBO STEEL GROUP CHINA
    USA ---Alfaro
    ASTM A182 F55 Super Duplex Flange ,Good quality , we like that ! And delivery time in time also ,very professional.
Contact Person : Joy Wang
Phone Number : 0086-21-31261985
WhatsApp : +8613524668060

Stainless Steel Seamless Pipe ASTM A312 Grade 304/316L Seamless Tube SCH40 SCH80

  • Stainless Steel Seamless Pipe ASTM A312 Grade 304/316L Seamless Tube SCH40 SCH80
  • Stainless Steel Seamless Pipe ASTM A312 Grade 304/316L Seamless Tube SCH40 SCH80
  • Stainless Steel Seamless Pipe ASTM A312 Grade 304/316L Seamless Tube SCH40 SCH80
  • Stainless Steel Seamless Pipe ASTM A312 Grade 304/316L Seamless Tube SCH40 SCH80
  • Stainless Steel Seamless Pipe ASTM A312 Grade 304/316L Seamless Tube SCH40 SCH80
Place of Origin Shanghai,China
Brand Name TOBO
Certification ISO/TUV/SGS
Model Number Stainless Steel Seamless Pipe
Minimum Order Quantity 1PC
Price Negotiable
Packaging Details Standard Shipping Package
Delivery Time 15-30 Workdays
Payment Terms T/T,Western Union
Supply Ability 10 Ton/Month
Product Details
Product Name Stainless Steel Seamless Pipe ASTM A312 Grade 304/316L Seamless Tube SCH40 SCH80 Dimension Standard Or Customized
Section Round Width According To Customer Needs
Term Name Stainless Steel Square Tube Standard ASTM A312, A213, A269, EN 10216-5, JIS G3459
Outer Diameter 2.5cm Surface Finish Flat Surface
Delivery Condition Annealed Outside Diameter 6mm To 610mm
Origin China End Cut Plain End
Size Range Customized Surfacefinish Polished, Pickled, Mill Finish
Port Shanghai/Ningbo/Qingdao Processing Technology Hot Rolled
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Product Description

Stainless Steel Seamless Pipe ASTM A312 Grade 304/316L Seamless Tube SCH40 SCH80

 

1.Product Description

This product is positioned as "traceable, verifiable, and fully compliant" engineering-grade stainless steel seamless pipe. Each pipe is incorporated into a digital quality management system from the moment of steelmaking, undergoing pre-pour spectral analysis, in-line ultrasonic testing, dual hydrostatic/pneumatic pressure tests, and optional independent third-party inspections (SGS/BV/TÜV). A complete Mill Test Certificate (MTC 3.1/3.2) is provided, covering chemical composition, mechanical properties, intergranular corrosion test results, dimensional inspection, and NDT reports. Surface quality is inspected and accepted per ASTM A530 standards, with strictly quantified allowable defect depths and repair grinding limits. Ends can be finished as Plain End, Beveled End, or Threaded per customer requirements, with rust-preventive oil and fully enclosed end caps provided.

 

2. Product Applications

This series is designed for large-scale infrastructure and industrial projects involving international procurement, third-party surveillance, and strict site acceptance. Specific applications include:

  • High-pressure process piping in international EPC petrochemical projects (Middle East, Southeast Asia, Africa, etc.)

  • Topside module piping systems on Floating LNG (FLNG) production and storage units

  • Main steam piping in ultra-supercritical thermal power and nuclear power conventional islands

  • Purified water and Water-for-Injection (WFI) distribution systems in biopharmaceuticals (compliant with FDA/GMP requirements)

  • Hygienic-grade piping for CIP (Clean-In-Place) systems in high-end food and beverage industries

  • Marine high-pressure hydraulic systems and inert gas lines (requiring DNV/ABS/LR class society certification)

  • Deep-sea mining risers and subsea control lines (umbilical tubes)

3. Product Advantages

  1. Full-chain traceability: From steel ingot Heat No. → piercing batch → cold-rolling lot → heat treatment furnace No. → final finished pipe ID, all process parameters are recorded in the ERP system. Any single pipe's full life-cycle data can be retrieved within 30 minutes.

  2. Dual NDT assurance: Standard supply includes 100% Ultrasonic Testing (UT) + 100% Eddy Current Testing (ET). Magnetic Flux Leakage (MFL) or Penetrant Testing (PT) can be added per customer requirements, ensuring zero tolerance for internal and external defects.

  3. Quantified surface defect control: Per ASTM A530/A480, allowable scratch depth is clearly defined as ≤ half of the wall thickness negative tolerance, and the wall thickness after repair grinding shall not fall below 95% of the nominal wall thickness. Acceptance criteria are clear and actionable.

  4. Precision end geometry: Bevel angle (37.5°±2.5°), land thickness (1.6mm±0.8mm), and end squareness are strictly controlled, allowing direct fit-up welding without on-site rework, significantly saving installation man-hours.

  5. Internationally recognized certification system: Can simultaneously provide ISO 9001, PED 2014/68/EU (CE mark), ASME U-stamp, and NORSOK M-650 material certifications, eliminating technical barriers in international trade.

  6. Anti-corrosion coating and packaging damage prevention: External surfaces can be coated with transparent rust-preventive oil or weldable primer, with multi-layer stretch film wrapping plus wooden pallets/steel frames, ensuring no scratches, deformation, or corrosion during ocean freight and inland transshipment.

Stainless Steel Seamless Pipe ASTM A312 Grade 304/316L Seamless Tube SCH40 SCH80

4.​Key Product Parameters

Parameter Category Quality & Delivery Specifications / Description
Dimensional Acceptance Standard OD tolerance: ±0.15mm for D<50mm; ±0.5%～±1.0% for D≥50mm; WT tolerance: ±10%～±12.5% (varies by standard)
Straightness Requirement Total bow ≤ 0.15% × total length; Bow over any 3m length ≤ 3.0mm, meeting API 5LC requirements
End Bevel Specifications Bevel angle 37.5°±2.5°, land thickness 1.6mm±0.8mm, end squareness ≤0.5mm (for WT ≥3mm)
Surface Defect Allowance Limits Single defect depth ≤0.1mm or ≤5% of WT (whichever is smaller); total allowable repair ground area ≤5% of pipe surface area
NDT Sensitivity UT: Φ1.2mm flat-bottom hole equivalent sensitivity (ASTM E213); ET: Φ0.5mm through-hole standard (ASTM E571)
Hydrostatic Test Parameters Minimum test pressure calculated per formula; hold time ≥10s (small bore) / ≥15s (large bore); test temp ≥5°C, no leakage or permanent deformation
Intergranular Corrosion Test Per ASTM A262 Practice C (nitric acid) or Practice E (oxalic acid); no through-thickness cracks on the bent tension surface after testing
Material Certificate Grade Standard EN 10204 Type 3.1 (inspection certificate); Type 3.2 (third-party inspection agency countersignature) available upon request
Packaging Grade Export standard: hexagonal bundling + moisture-proof paper inner lining + galvanized steel straps + end protective rings + pallet support (single bundle weight ≤3.5 tons)
Documentation Delivery List MTC, heat treatment curve report, dimensional inspection records, NDT raw data logs, surface quality report, packing list, Certificate of Origin (optional)
Representative Inspection Agencies SGS, BV, TÜV Rheinland, Intertek, or client-designated third-party for mill surveillance and witness testing

 

FAQ

1. Are you trading company or manufacturer ? We are manufacturer ,You can see the certification.

2.How long is your delivery time? Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.

3. Do you provide samples ? is it free or extra ? Yes, we could offer the sample for free charge but need pay the cost of freight.

4. What is your terms of payment ? Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.

Tags:

seamless stainless steel tube

marine stainless steel tubing

stainless steel round tube