The predecessor of Huahai Seals can be traced back to Wenzhou Ouhai Donghai Asbestos Gasket Factory founded in 1992. The company was officially established in 2001 and has gradually grown into a professional manufacturer of metal seals integrating design, forging, heat treatment, machining, and testing. The company’s main products include octagonal gaskets, elliptical gaskets, and RX and BX series ring gaskets suitable for extreme high-pressure conditions, which can meet the multi-level sealing needs from conventional pipelines to high-pressure reactors. Octagonal pads and elliptical pads are used as R-type standard ring pads, with a cross-section designed in a regular octagonal or elliptical shape. After installation, they can form a hard seal contact between metals and are suitable for flange connections in industrial pipelines such as petrochemical and power industries. The octagonal pad series products have been widely used in large-scale enterprise projects in industries such as petroleum, chemical, and power due to their good pressure and temperature resistance.
In terms of material selection, Huahai Seals can provide a variety of sealing products made of different materials, including stainless steel and special alloy materials, which can be selected according to different industrial working conditions. The product has a wide temperature range and can adapt to various working conditions with pressure levels. The leakage rate can be controlled at a low level and meets relevant international standards.
In terms of quality control and industrial capabilities, Huahai Seals has established a full chain independent production capacity for design, forging, heat treatment, machining, and testing. Each link is completed by independent equipment to ensure process consistency. The enterprise has passed the relevant quality management system certification and is equipped with advanced testing equipment such as CNC machine tools and spectrometers. In 2025, the company’s new factory building will be successfully completed, integrating multiple scattered factory areas together to form a large-scale high-end sealing production capacity. As a member of the National Technical Committee for Standardization of Pipeline Accessories, the company has participated in drafting multiple national and industry standards.
Wenzhou Huahai Seal Technology Co., Ltd. is providing reliable metal seal matching services for pipeline flange connections in basic industries such as petrochemicals, power energy, and marine engineering, with years of industry accumulation and continuous technological innovation, from metal hard sealing of octagonal gaskets to full process quality control, from refining equipment in petrochemicals to steam systems in power energy.