The DIN 2440 standard applies to medium-weight tubes suitable for screwing used in applications of medium pressure air and non-hazardous gases.

DIN 2391 standard specifies the Seamless steel tubes used for Mechanical and Automobile.The main products of steel / steel grade: DIN2391-1(ST35, ST45, ST52).

ASTM A312 Standard Specification covers standard specification for seamless, straight-seam welded, and cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service.

Astm A335 standard specication for seamless ferritic alloy-steel pipe for high-temperature service

ASTM A213-Seamless ferritic and austenitic alloy-steel boiler, superheater and heat-exchanger tubes

ASTM A192 / A192M Standard Specification for Seamless Carbon Steel Boiler Tubes for High-Pressure Service