Dalipu npt thread elbow butt weld fittings

1. Product Name:Dalipu npt thread elbow butt weld fittings

2. Standard:API, ASTM, GB, API 5CT, API 5DP, API 5L, ASTM A179-1990, ASTM A254-1997, ASTM A358-2005, GB/T 3639-2000

3. Grade:API J55-API P110, Cr-Mo alloy, API J55, API K55, API L80, API N80, API P110, 13CrMo44, 30CrMo, 34CrMo4

4. Application:Hydraulic cylinder,automobile,Boiler tube, geological pipe

5. Steel Grade:08#,10#,15#,20# ,Q215A,Q215B,Q235A,Q235B

6. length:5.8m/6m or customized

7. Marking:Standard marking, or according to your request.

8. Advantages:(1)Reasonable price(2)Abundant stock and prompt delivery(3)Rich supply and export
   
   experience,sincere service

9. Packaging:by requirements of customers

10. Date of Delivery:Shipped in 10 days after payment

11. Port of Shipment:Tianjin Port,Tianjin, China

    
    

    
    

12. Nominal Pipe Size	Outside Diameter	Threads Per Inch(Pitch)	Thread Pitch Length	Pitch DiameterAt External Thread Start
    1/8	0.405	27	0.03704	0.36351
    1/4	0.540	18	0.5556	0.47739
    3/8	0.675	18	0.5556	0.61201
    3/4	0.840	14	0.07143	0.75843
    1	1.050	14	0.07143	0.96768
    1-1/4	1.315	11.5	0.08696	1.21363
    1-1/2	1.660	11.5	0.08696	1.55713
    2	1.900	11.5	0.08696	1.79609

13. OD(inch)

14. Dalipu npt thread elbow butt weld 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 or compression fittings in which the threads merely hold the pieces together and do not provide the seal. As the thread body is tapered (0.75 in/ft or 62.5 mm/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 or tape. 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,  1 1⁄4,  1 1⁄2, and 2 inch.