The set of screw-thread standards used to connect and seal pipes with an external male thread and an internal female thread is known as which standard?

• A. BSP
• B. JIC
• C. ORFS
• D. ORB

Answer: (A)

A pipe-joining system that uses an external male thread on one piece and an internal female thread on the mating piece is governed by British Standard Pipe. BSP defines both tapered (BSPT) and parallel (BSPP) thread forms and is widely used for connecting pipes and fittings with sealing achieved by a gasket, washer, or thread interference depending on the form. This differs from other options like JIC, ORFS, or ORB, which are different styles of hydraulic fittings that use flare or O-ring seals rather than standard pipe threads. So, the standard described is British Standard Pipe.