API 5LGB /ASTM A106B/ASME A53 GB

API 5L refers to a specification for steel pipe used in the transportation of natural gas, oil, and other fluids. It is developed by the American Petroleum Institute (API) and sets standards for the manufacturing, testing, and usage of line pipes. API 5L pipes are commonly used in the energy industry and come in different grades, such as API 5L Grade B, X42, X52, X65, etc., which indicate their yield strength and other properties. These pipes are designed to withstand high pressure and are typically used for long-distance pipelines.

Seamless carbon steel pipes are made from steel ingots or solid billets that are perforated into tubes, and then hot rolled, cold rolled, or cold drawn. Seamless carbon steel pipes play an important role in China’s steel pipe industry.