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steel npt pipe nipples in pipe fittings

Product Name
Dalipu steel npt pipe nipples in pipe fittings
Standard
API, ASTM, GB, API 5CT, API 5DP, API 5L, ASTM A179-1990, ASTM A254-1997, ASTM A358-2005, GB/T 3639-2000
Grade
API J55-API P110, Cr-Mo alloy, API J55, API K55, API L80, API N80, API P110, 13CrMo44, 30CrMo, 34CrMo4
Application
Hydraulic cylinder,automobile,Boiler tube, geological pipe
Steel Grade
08#,10#,15#,20# ,Q215A,Q215B,Q235A,Q235B
length
5.8m/6m or customized
Marking
Standard marking, or according to your request.
Advantages
Reasonable price with

excellent quality
Abundant stock and

prompt delivery
Rich supply and export

experience,sincere service
Packaging
by requirements of customers
Date of Delivery
Shipped in 10 days after payment
Port of Shipment
Tianjin Port,Tianjin, China
Dalipu steel npt pipe nipples in pipe fittings
The taper on NPT threads allows them to form a seal when torqued as the flanks of the threads compress against each other, as opposed to parallel/straight thread fittings orcompression fittingsin which the threads merely hold the pieces together and do not provide the seal. As the thread body is tapered (0.75in/ft or 62.5mm/m) a larger diameter keeps compressing into a smaller diameter and finally forms a seal (no clearance remains between the crests and roots of the threads because of the taper). This means that NPT fittings should be burr-free and lubricated using a lubricating material like lubricating paste ortape. The use of tape also helps to limit corrosion on the threads, which otherwise can make future disassembly nearly impossible.
Commonly used sizes are 1⁄8, 1⁄4, 3⁄8, 1⁄2, 3⁄4, 1, 11⁄4, 11⁄2, and 2inch.

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