ASTM A795, A53 and A135 pipe are all steel pipes produced in accordance with the standards of the American Society for Testing and Materials (ASTM International). These three types of pipes can all be suitable for firefighting pipes and can also be produced by electric resistance welding, but they are slightly different.

Regarding the design of surface casing, technical casing and oil layer casing, each has its own design characteristics and design emphasis.

ASTM A795 ERW Pipe is an electric resistance welded pipe produced in accordance with the standards of the American Society for Testing and Materials (ASTM International).

The casing head is an important connection between casing and wellhead equipment.Its lower end is connected to the surface casing through threads, and its upper end is connected to the wellhead device or blowout preventer through flanges or clamps.

Stainless steel 304 ERW pipe is a metal material made of austenitic stainless steel 304 through resistance welding.

Two different building materials, pipe piles and H piles, are widely used in various structures. This article will compare the characteristics of pipe piles and H piles in detail to help readers make clear decisions based on actual needs.