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

Cangzhou Yongwang Pipeline Manufacturing Co., Ltd. produces 304 stainless steel flanges for pipeline systems in chemical processing, food and beverage, and marine environments. The 18% chromium, 8% nickel austenitic composition provides resistance to intergranular corrosion and moderate chloride exposure. Available configurations include weld neck (WN), slip-on (SO), and blind flange types covering nominal pipe sizes from 1/2 inch to 48 inches. The supplier states ASTM A182 standard compliance, though buyers should request the specific edition and any supplementary requirements marked on material certificates.

The forged or cast construction methods for these flanges depend on pressure class and dimensional requirements. ASTM A182 Grade F304 specifies minimum tensile strength of 515 MPa and yield strength of 205 MPa at room temperature. Forged flanges generally offer superior grain structure and mechanical properties compared to cast alternatives, particularly in Class 600 and above ratings. Surface finish requirements, whether machined to 125-250 AARH or smoother for gasket seating, should be specified at inquiry stage. The 304 grade is susceptible to sensitisation if held in the 425-870 degrees C range during welding; post-weld heat treatment or selection of low-carbon 304L may be advised for corrosive service.

End users span oil and gas refineries, municipal water treatment facilities, shipbuilding yards, and pharmaceutical piping installations. The slip-on type suits low-pressure, non-critical lines where alignment tolerance is generous; weld neck flanges are preferred for cyclic loading and high-pressure hydrocarbon service. Blind flanges terminate lines or provide access for inspection and cleaning. Trade terms mentioned in the supplier's materials include FOB and CIF, though exact port, minimum order quantities, and lead times require direct confirmation. Wooden case packaging is referenced for international shipment; buyers should verify internal protection against sea-air corrosion during transit.

Cangzhou Yongwang Pipeline Manufacturing Co., Ltd. is headquartered in Yans猥琐shan County, Cangzhou, Hebei Province, China, postal code 061300. The company holds both imported supplier tier and harbor trust tier designations on the platform, indicating a registered business with basic verification but not necessarily on-site factory audit or third-party manufacturing assessment. The response rate shows 0.00% with zero average response hours, meaning no messaging history is recorded through the platform. Buyers should establish direct communication channels, preferably by telephone or video conference, to evaluate responsiveness and technical competence before committing to orders.

The supplier's specialisation in pipeline manufacturing places it within Cangzhou's established metal fabrication cluster, a region with decades of experience in carbon and stainless steel pipe fittings. The listing does not disclose year of establishment, number of employees, annual turnover, export markets served, or ISO 9001 certification status. No named end clients, project references, or API, PED, or ASME quality system certifications are mentioned. The address in Yanshan County, a known production centre for flanges and pipe fittings, suggests access to forging and machining subcontractors, though buyers should verify in-house versus outsourced manufacturing capabilities during factory assessment or third-party inspection.