Updated November 2026 · Technically Reviewed by the Hunan Baling Steel Co., Ltd. technical team ASTM A312 covers seamless, straight-seam welded, and heavily cold worked austenitic stainless steel pipe for high-temperature and general corrosive service. Leaving the standard number alone leaves the supplier free to interpret alloy grade, manufacturing route,

Selecting steel pipe for hydrogen service begins with the operating conditions and the design basis. Cryogenic service can involve a temperature difference of 300° F or more from ambient, so thermal contraction belongs in the design basis. Only select a material family after hydrogen phase, composition, pressure, temperature and loading

Quick selection checks Product family: pressure pipe fitting or structural pipe connector. Size: nominal designation plus the matching pipe and connection dimensions. Thread: exact standard and male/female arrangement. Duty: fluid, pressure, temperature and installation conditions. Order: identified items, quantities, documentation and delivered cost. Galvanized pipe fittings are zinc-coated components, used

Comparing equal angle vs unequal angle steel begins with the two legs. Equal angles have legs of equal width, while unequal angles have different widths. Choose the geometry that offers the best fit and clearance and size the member for its actual load, orientation and restraint. A longer leg doesn’t

A square pipe bend is a shaped length of square hollow tubing. Specify its outside size, wall thickness, material, radius reference, finished angle, straight lengths and acceptance limits before choosing a forming process. Rotary draw bending is suitable for repeated corners, and roll bending for sweeping curves, but the finished