Seamless elbow is a pipe fitting that changes the direction of the pipeline. In pipeline systems, elbows are commonly used connecting pipe fittings, which are used to connect pipeline corners and change the direction of pipelines.

ASTM A199 heat exchanger tube is a medium alloy steel cold drawn seamless steel tube mainly used in heat exchangers and condensers.

ASTM A192 / ASME SA192 Standard covers minimum-wall thickness, seamless carbon steel boiler and superheater tubes for high- pressure service.

A335 specification alloy steel pipe is an imported heat-resistant low-carbon alloy steel with high thermal strength at 450~550℃.

ASTM A179 is a steel pipe standard established by the American Society for Testing and Materials (ASTM) and is mainly used in the manufacture of high-pressure e

API 5L seamless pipes are used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, coal gas, water and certain solid materials; API 5L welded pipes are mainly used for pipelines transporting oil and natural gas.