Butt welded fittings Detail: Seamless or welded fittings Specifications and steel grade: Carbon steel: astm a234 wpb, wpc; astm a420 wpl9, wpl3, wpl6, wphy-42, wphy-46, wphy-52, wphy-60, wphy-65, wphy-70, Alloy steel: astm a234 wp1, wp11, wp12, wp22, wp5, wp9, wp91 Stainless steel: astm a403 wp304/304l, wp316/316l, wp321, wp347 Size range: Carbon steel: from ½" up to 96" Stainless steel (seamless): from ½ up to 24" Stainless steel (welded): from 26" up to 72" Schedule: Carbon & alloy steel: sch std, xs, xxs, sch 10 ~ sch 160 and special thickness Stainless steel: sch 5s, 10s, 40s, 80s and special thickness