JIS G3458 Alloy Steel Pipes pipe fittings materials data you may also check non standard sizes pipe fitting weight online calculation, pipe fitting surface area online calculation,pipe fitting surface volume online calculation from our pipeline tool link: https://alloypipefitting.com/fitting-calculator.html For the pipe fitting material, please check butt-weld-fitting-standard-data JIS G3458 standard is made for heat resistant alloy