Commonly Used Acronyms in PVF
TBE = Thread Both Ends. TBE is commonly used with nipple and swage nipple.
TOE = Thread One End. TOE is commonly used with nipples. The other end is assumed to be plain.
PBE = Plain Both Ends. PBE is commonly used with nipple and swage nipple.
BBE = Bevel Both Ends. BBE is commonly used with nipple and swage nipple. The ends are beveled for welding.
BXT = Beveled By Threaded. BXT is commonly used with swage nipples. The large end is beveled for welding and the smaller end is threaded.
TXB = Threaded By Beveled. TXB is commonly used with swage nipples. The large end is threaded, and the smaller end is beveled for welding.
NPT = National Pipe Taper. ASME B1.20.1 (Pipe Threads General Purpose) is the specification that covers the tapered threading of piping components.
NPSC = National Pipe Straight Coupling. ASME B1.20.1 (Pipe Threads General Purpose) is the specification that covers the internal straight threading of couplings. “They are used to form pressure-tight joints when assembled with an NPT external taper thread and made up wrench-tight with sealant”
CRN = Canadian Registration Number and is a system for reviewing the design of a pressure vessel or component.
AML = Approved Manufacturer List. A list of Manufacturers and Suppliers that are approved by the purchasing company (End-Users, Engineering Firms, Contractors). Companies like Exxon, Dow, and MRC have rigorous requirements that manufacturers and suppliers are expected to meet before they are ever considered for the AML. These companies must pass an in-depth quality audit and be approved by the purchaser. Each AML is different and may have different manufacturers on the list.