Import Flange Typewriting — Buy in Bulk from Supplier in China

Flange typewriting refers to the embossed or stamped markings on flange faces that identify material grade, pressure class, size, and compliance standards. These markings are critical for traceability and installation compliance in piping systems. The supplier produces flanges in multiple types including weld neck, slip on, socket weld, lap joint, threaded, blind, reducing, and spectacle plate, all featuring permanent stamping per ASME B16.5 and MSS SP-44.

Flanges are forged from carbon steel grades such as ASTM A105 or alloy grades like A182 F304/L and F316/L, with pressure ratings from #150 to #2500 and PN16 to PN200. The stamping depth and font size follow industry standards to remain legible after machining and coating. Galvanizing options include electro-galvanized or hot-dip finishes for corrosion protection, though the source does not specify coating thickness or salt spray resistance.

These flanges are sourced by pipeline contractors, power plant engineers, and chemical processing facilities requiring certified components for high-pressure systems. Buyers typically order in full pallets or container loads, with custom marking requests accepted. Packaging is in wooden crates with protective film. Lead time and MOQ are not stated; buyers must confirm production schedules. Incoterms such as FOB Tianjin or CIF Rotterdam are standard but require explicit agreement.

WH-steel Co. Ltd. is located in Cangzhou City, Hebei Province, China, with a registered address in Beijing. The supplier specializes in forged steel flanges and related piping components. The listing confirms production of multiple flange types and materials but provides no information on workforce size, annual output, or quality control processes. The trust tier is harbor, indicating export capability, but no response rate or verification details are available.

The company does not claim certifications such as ISO 9001 or API 6A, nor does it list any third-party inspection partners. Buyers should assume this is a production-focused supplier without engineering support. All technical claims must be verified through material test reports and dimensional inspection certificates. No client references or case studies are provided; sourcing decisions must rely on sample evaluation and third-party audit.