DS Pipe and Steel Supply

Pipe Thread

Pipe threading is formed on the outside caliber of a piece of fitting, tubing, or pipe. Threading forms a spiral ridge on the end of a pipe, bar, cylinder, or rod, enabling it to join them together. The inside diameter of the pipe generally identifies pipe threads. The size of the inside diameter will determine how many turns it will take to assemble and lock together. Pipes and fittings are primarily used to carry liquids and gasses and need threading to help make the seals better and stronger.

Types of Threads

NPT/NPTF Thread Type (National Pipe Tapered Fuel)

North America uses this thread type the most. It is identified by its self-sealing, tapered outer and inner diameter. NPTF is a partially compatible variation of NPT (National Pipe Taper Fuel). It ensures an even tighter seal with no leaks. However, it is crucial to remember that combining these types reduces its leak-resistant capacity. NPT threads must be greased using lubricating paste or tape and be clear of burrs. Proper greasing prevents thread corrosion. Thread corrosion must be avoided because it can make future disassembly practically impossible.

BSP Thread Type (British Standard Pipe)

This is a universally recognized standard thread type for connecting and sealing pipe ends. It is employed throughout all of Europe. BSP threads come in two varieties: BSPP and BSPT. Parallel or straight threads are referred to as BSPP. Alternatively, BSPT refers to tapered threads.

Pipe Threading at DS-Pipe & Steel

Our team of skilled professionals can thread galvanized, stainless steel, aluminum, and PVC-coated rigid pipe according to your specifications. Our threading services are performed in-house on our state-of-the-art machines. Give us a call at 410-539-8000, our sales team is ready to assist you Monday through Friday, 7 am to 5 pm.