1/2-8 galvanized seamless steel close nipples with NPT thread

What's a close nipple?

In its most basic form, a pipe nipple is a short length of pipe with male pipe threads at both ends for connecting other fittings. Generally, there is a short distance of unthreaded pipe between the two threaded ends, depending on how far apart you need the attached fittings to be. When there is no unthreaded pipe between the two connecting ends, the pipe nipple is called a close nipple or a running nipple. In that case, connected fittings come close to touching one another, with very little nipple visibility.

steel pipe nipples&sockets.
Place of Origin: China

Specifications:

1.SIZE: 1/8"-6"
2.Threading standard: ANSI/ASME B1.20.1,ISO 7-1,ISO228-1,DIN2999,JIS B0203 etc.
3.pipe standard: EN 10255,DIN2440,BS 1387B,ASTM A53B,ASTM A120 etc.
4.Galvanized,electroplated and black surface,

Usage challenges of close nipple

Close nipples are difficult to install and remove. The closed plumbing nipple can only be unscrewed by gripping one threaded end with a pipe wrench, which may damage the threads and necessitate replacement. So, a nipple can require a specialty tool such as a nipple wrench (or an internal pipe wrench), which grips the inside of the pipe, leaving the threads undamaged.

Due to the unique design of the closed nipple pipe, which may cause the risk of leakage, the threaded parts can become damaged during installation and removal. Please avoid overtightening; choose the right tool (nipple or internal pipe wrench); do not disassemble frequently; prevent corrosion and wear; replace parts on time to identify and resolve any problems.

Cangzhou Hongxin Pipe Fittings Co., Ltd., which was established in 1998, is a professional 

manufacturer of steel & stainless steel fittings in China. Our company is 180 kilometers 

away from Tianjin Port of China, enjoying very convenient transportation. All our products 

are designed, manufactured and tested in strict compliance with the standards of DIN, BS, 

ISO, ANSI, API, JIS, etc. 

Our main products include steel pipe nipples, sockets (black or galvanized, seamless or 

welded), stainless steel pipe fittings, malleable iron pipe fittings (union type, elbows, 

reducers, bushings, couplings, caps, nuts, hose nipples and so on) and butt-welded pipe 

fittings. We are also specialized in pipe cutting, bending, threading and end finishing, 

according to customers' needs. 

Presently, we export 90% of our products to Germany, France, Russia, Poland, Lithuania, 

Israel, the Middle East and South America. With many years' efforts and support from our 

valuable customers, these products have obtained a big market share in the world. Our 

business principle is "Superior Quality, Competitive Price, Timely Delivery and Considerate 

Service". 

We welcome all customers to contact us for more information. We assure you, with our 

technical knowledge and experience, our company will be one of you stable and long-term 

business partners in China!