Import Dished Boiler Head-Boiler Head — Buy in Bulk from Supplier in China

Dished boiler heads from Dingjin General Machinery Co., Ltd. are manufactured using integral spinning and stamping technologies, with diameters ranging from 325mm to 10,000mm and thicknesses up to 50mm for spun heads and 400mm for stamped heads. The maximum thickness achievable with multi-petal construction is 300mm, accommodating high-pressure vessel requirements. All heads are formed from pressure vessel-grade steel plates, conforming to ASME SA-516, SA-537, or equivalent standards as specified by the buyer.

The supplier uses three German-made spinning units and seven hydraulic presses, including two 1000-ton, one 2000-ton, one 8000-ton, and one 16000-ton dual-action presses, all custom-built or sourced for precision forming. Material grades typically include carbon steel, low-alloy steel, and stainless steel, with common specifications such as SA-516 Gr. 70, SA-387 Gr. 11, or S30408. Surface finish after forming is typically ground to Ra 3.2µm unless otherwise specified, and all heads undergo ultrasonic testing per ASME Section V for internal integrity.

These dished heads are primarily purchased by boiler manufacturers, pressure vessel fabricators, and OEMs in oil and gas, chemical processing, and power generation industries. Trade terms include FOB Dalian, CIF ports in Southeast Asia or the Middle East, and EXW from Dalian. Minimum order quantities are negotiable based on size and complexity, and lead times range from 4 to 12 weeks depending on fabrication method and material availability. Documentation includes material test reports, dimensional inspection certificates, and non-destructive testing records.

Dingjin General Machinery Co., Ltd. operates from Jinzhou District, Dalian, with a 74,000 square meter facility equipped with custom-built hydraulic presses and German spinning machinery. The company specializes in dished heads and pressure vessel components, with no public information on employee count, annual revenue, or client list. Trust signals include verified factory address and equipment specifications, but no third-party certifications, export history, or response rate data are provided.

The supplier has no public track record of international shipments or compliance certificates such as ISO 9001 or PED. Their capabilities are defined solely by equipment capacity and technical descriptions in their listing. Buyers should treat this as a manufacturer with direct production capability but no verified quality management system documentation. All claims are limited to physical assets and process descriptions, with no references to past projects or industry awards.