Category Archives: Industrial Plumbing Information

pipe nipples

TYPES OF THREAD BEST FOR PIPE THREADING AND SCREW FITTINGS

There are 2 types of threads which are use for Pipe threading or in screw Pipe Fittings, Fasteners and hydraulic systems.

  1. NPT threads
  2. BSP threads.

NPT threads:

NPT thread is also known as National Pipe threads. It’s an American Pipe thread standard for the Pipe. Its s also known as MNPT, NPT, NPT, external thread for Male Pipe Fittings, external male threads and also FPT. NPT (F) is used for Female Internal thread. Usually top protect the thread from getting leak sealant is use but with PCFSCT threads you don’t even need to use the sealant, as it perfectly get connected with female fitting and there is no chance for Pipe to get the leak. It doesn’t depend on the die of the Pipe but the thread size. All the threads have the same pitch, angled as per 60 degrees, and shape is valleys and the flat peak.

 

Trade Size Threads per inch Pitch Major Diameter (O.D)
Inch mm Inch mm
1/8 27 0.03704 0.94082 0.405 10.29
1/4 18 0.05556 1.41122 0.540 13.72
3/8 18 0.05556 1.41122 0.675 17.15
1/2 14 0.07143 1.81432 0.840 21.34
3/4 14 0.07143 1.81432 1.050 26.67
1 11 ½ 0.08696 2.20878 1.315 33.40
1 ¼ 11 ½ 0.08696 2.20878 1.660 42.16
1 ½ 11 ½ 0.08696 2.20878 1.900 48.26
2 11 ½ 0.08696 2.20878 2.375 60.33
2 ½ 8 0.12500 3.17500 2.875 73.03
3 8 0.12500 3.17500 3.500 88.90
4 8 0.12500 3.17500 4.500 114.30

 

BSP threads

BSP threads are also known as British Standard Pipe Threads. BSP thread is commonly used in Australia and the countries which were affiliated with British in past. BSP thread is not base on the die of the pipe, but it is base on trade size. This can create some confusion sometimes.

Parallel BSP is known as BSPP and Tapered BSP is known is BSPT.

In BSP also all threads have the same pitch, 55-degree angle, its shape in round peaks and valley.

Trade Size Threads per inch Pitch Major Diameter Minor Diameter Gage Length
Inch mm Inch mm Inch Mm Inch mm
1/8 28 0.0357 0.907 0.3830 9.728 0.3372 8.565 0.1563 3.97
1/4 19 0.0526 1.337 0.5180 13.157 0.4506 11.445 0.2367 6.012
3/8 19 0.0526 1.337 0.6560 16.662 0.5886 14.95 0.25 6.35
1/2 14 0.0714 1.814 0.8250 20.955 0.7336 18.633 0.3214 8.164
3/4 14 0.0714 1.814 1.0410 26.441 0.9496 24.12 0.3750 9.525
1 11 0.0909 2.309 1.3090 33.249 1.1926 30.292 0.4091 10.391
1 ¼ 11 0.0909 2.309 1.65 41.91 1.5336 38.953 0.5 12.7
1 ½ 11 0.0909 2.309 1.8820 47.803 1.7656 44.846 0.5 12.7
2 11 0.0909 2.309 2.347 59.614 2.2306 56.657 0.6250 15.875
2 ½ 11 0.0909 2.309 2.96 75.184 2.8436 72.227 0.6875 17.463
3 11 0.0909 2.309 3.46 87.884 3.3436 84.927 0.8125 20.638
4 11 0.0909 2.309 4.45 113.03 4.3336 110.073

 

 

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CARBON STEEL VS STAINLESS STEEL PIPES

Different grades of steel have been manufactured since the invention of steel. The grade variations of steel support its usage for different applications. The variation in grades of steel is achieved by varying the amount of carbon involved in the manufacturing process. According to industrial standards the proportion of carbon for optimum results is about 0.2% to 2.1%. Chromium, tungsten and manganese base iron can also be added in order to enhance base properties of steel. Varying proportion of steel plays a key role in the ductility of steel and increasing tensile strength that contributes to its high durability. The carbon inclusion can control thermal and electrical influences of the steel efficiently. However the materials are responsible to maintain uniformity within the crystalline structure of the basic iron atom.

Steel composed of these recipes highly depends on carbon in the formation of long lasting alloys. However the composition of tungsten, manganese and cobalt are also present with some unspecified proportions. The carbon composition makes steel hard and strong making it withstand under harsh thermal conditions successfully. However steel made up of carbon possess low ductility and anti-corrosive properties. Corrosion causes rusting to the steel due to oxidation those results in weakening of steel. Bridges are the example to portrait corrosion as bridges get corrode very early even after few years of construction. Stainless steel is a popular form of steel which never corrodes due to chromium plating. The best proportion of chromium plating is 10.5% to 11.0% of chromium

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PCFSCT is participating in PHEX+ May 2015

plumbing and heating exhibition 2015One of the most exquisite and premiere plumbing and heating exhibitions, PHEX+ will be organized during Wednesday 20 & Thursday 21 May 2015 at Alexandra Palace, United Kingdom.

Continuing the legacy of PHEX, organizers are determined to bring to you even better show this year with a number of new commercial manufacturers, buyers, suppliers and dealers from all over the globe. Not only this, local exhibitors who are the staple of the PHEX education will also be the part of this show. Continue reading

How do I install galvanized pipe fittings free of leakages?

It has been some years ever since I have been dealing with pipes and pipe fittings and during my research on this industry I figured out that people are facing problems in creating a joint between pipe nipples and T fitting. The question that comes into my mind was why? Why the Pipe nipple is not creating a perfect joint between T and pipe nipples or Elbow and Pipe Nipples. The comments I received from different people or pipe fitters was although they wrapped the thread many times but still there the leakage was found. Continue reading