Dalipu steel npt pipe nipples in pipe fittings

1. 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.

2. TIANJIN DALIPU OIL COUNTRY TUBULAR GOODS CO.,LTD is a modern professional industry and trade combined enterprise specializing in producing and trading seamless steel pipes.
   The main products of our company are the oil casings and oil pipelines. We not only supply our goods with many large oil fields, but also establish a long-term business relationship with the Middle East Europe, Africa and other countries around the world and co-operative very well.

3. Q: How long is your delivery time?
   A: If there are stocks, take 5-10days to delivery for small quantity, and 30-40days for bigger quantity;If no stock, depends on the steel billet purchase,
   Q: What about your payment term?
   A: Usually T/T or L/C, 30% deposit and 70% before delivery.
   Q: what about your standard delivery date
   A: 30 days after receiving deposit .We are pleased to provide you with best services in consulting, purchasing,transportation, installation, and after-sales services.

4. We would like to establish long term business with any reliable partner in the world . Any interesting or questions, pls don't hesitate to contace us . Waiting for your kindly reply . Thanks