The basic type of metal spiral wound gasket consists of a flexible filler made of metal strips. Metal spiral wound gaskets are categorized into those made of carbon steel, 201 stainless steel, 304 stainless steel, 316 stainless steel, and others. Based on the type of filler, they are further classified into graphite spiral wound gaskets, Teflon spiral wound gaskets, asbestos spiral wound gaskets, and so forth. Metal spiral wound gaskets are comprehensive sealing flange gaskets that are heat-resistant, high-pressure resistant, and corrosion-resistant. Due to their wide range of applications, better performance, and lower cost, they have been widely adopted by manufacturers in sectors such as power plants, refineries, and coal plants, becoming the mainstream for pipe flange sealing gaskets.

There are numerous execution standards for metal spiral wound gaskets, with GBT4622, HGT20610, and HGT20631 being the most commonly selected.

The friction coefficient of metal spiral wound gaskets is very low, ranging only between 2% and 5%. Therefore, even when used in bridges weighing tens of thousands of tons, the thrust force is only a few hundred tons, making the thrust equipment relatively simple. During the manufacturing process, although there is some wear on the metal surrounding the spiral wound gasket, overall costs are reduced. Metal spiral wound gaskets are a common type of gasket and are available in a variety of options in the market. Many customers are unsure how to select the appropriate standard for metal spiral wound gaskets when using them. The friction load capacity of metal spiral wound gaskets is a primary characteristic that people consider. In the operation of various equipment, the application progress is easy to grasp, and the overall progress can also be determined based on the size of the prefabrication yard at the bridgehead. If short sections of 4 to 5 meters can be developed into long sections of several tens of meters, the progress can be significantly accelerated, eliminating the need to erect scaffolding inside the bridge tunnel, and the metal surrounding the spiral wound gasket will also be protected from the influence of flowing water and traffic underneath the bridge.