Designed to slip iide Schedule 80 or less steel pipe. Fits iide the bolts of 150 & 300-pound American Standard steel pipe flanges. Excess flow check valves may also be furnished for ring-type joints. Generous flow channels provide low-pressure drops. Heavy-duty steel cotruction will withstand temperatures from -50° F (-45° C) to 300° F ( 148° C) and internal pressures up to 1900 psig (131 barg).