Import 304 Seamless Stainless Steel Pipe — Buy in wholesale FOB from Supplier in China

This 10-inch 304/304L seamless stainless steel pipe is manufactured from austenitic stainless steel with a composition of 18% chromium and 8% nickel, delivering the inherent corrosion resistance and oxidation protection that defines the 304 grade. The seamless construction eliminates weld seams, providing uniform wall thickness and enhanced pressure containment for high-stress applications. It is offered in compliance with ASTM A312 standards, the governing specification for seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe, with availability in various wall thicknesses to suit different pressure ratings and mechanical loads. The pipe supports sterilization protocols, a critical requirement for hygienic process lines, and tolerates elevated temperatures without structural degradation.

The dual certification as 304/304L indicates carbon content controlled to 0.03% maximum in the L-grade variant, improving weldability and reducing susceptibility to intergranular corrosion in the heat-affected zone after welding. Wall thickness options span Schedule 5S through Schedule 80 and beyond, with exact schedules determining pressure ratings per ASME B36.19M. Surface finish is typically pickled and annealed, though further cold finishing or polishing may be specified. The material exhibits a minimum tensile strength of 515 MPa and yield strength of 205 MPa in the annealed condition, with elongation of 35% minimum, per ASTM A312 mechanical property requirements. Standard lengths are 6 metres or random mill lengths, though cut-to-length service may be arranged.

Primary buyers include petrochemical refineries, food and beverage processors, pharmaceutical manufacturers, and municipal water treatment facilities where fluid purity and system integrity are paramount. The pipe serves in heat exchanger tubing, process piping, high-pressure hydraulic lines, and structural supports in corrosive atmospheres. Global export volumes are typically quoted in metric tonnes with FOB China terms from Shanghai or Ningbo port. Buyers should confirm exact wall thickness requirements, end finish specifications (plain, bevelled, or threaded), and any supplementary testing such as hydrostatic, ultrasonic, or eddy current inspection prior to order placement.

Zhejiang Zhonggang Mining Co. Ltd is headquartered at Floor 19, Huameng Business Plaza, No. 2 Chezhan Avenue, Wenzhou, Zhejiang Province, 325000, China. The supplier carries a harbor trust tier classification, indicating baseline marketplace verification without advanced assurance credentials. The response rate is recorded at 0.00% with zero average response hours, which suggests either a newly registered profile, incomplete engagement tracking, or limited active inquiry management. Buyers should initiate contact to assess current responsiveness and operational status directly.

The listing positions the company as a source of ASTM A312-compliant seamless stainless steel pipe for industrial piping systems. No verified manufacturing certifications, ISO registrations, or third-party audit credentials are stated in the profile. The supplier references export capability in metric ton volumes with FOB pricing, though exact minimum order quantities and confirmed lead times are not specified. Buyers are advised to request mill test certificates, material test reports with chemical composition and mechanical property verification, and confirmation of inspection protocols before committing to purchase. The Wenzhou location places the supplier within China's established stainless steel processing corridor, though proximity to raw material producers versus finishing facilities should be clarified.