Marine engineering

ASTM A335 is often called as chrome moly pipe because of the chemical contain of Molybdenum (Mo) and Chromium (Cr). Molybdenum increases the strength of steel and Chromium (or chrome) is the essential constituent of stainless steel.

GB 3087 Grade 20 refers to a specific grade of seamless carbon steel boiler and superheater tubes according to the Chinese National Standard GB 3087. These tubes are designed for high-pressure and high-temperature applications, commonly used in boilers and heat exchangers.

ASTM A134/ASME SA134 Carbon Steel funnels are reasonable for bowing, for flanging, for welding, and so on.

15MoG steel pipe is a low-alloy steel pipe commonly used in high-temperature and high-pressure petrochemical equipment, boilers and heat exchangers and other applications.