Name of Legally Binding Document: JIS B Taper pipe threads. Name of Standards Organization: Japan Standards Association (JSA). UDC JIS. Japanese Industrial Standard. Designation of thread . r = P. P = n. JIS B ISO (BS21). C JIS B – Download as PDF File .pdf), Text File .txt) or read online. JIS B .

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For all metric screw threads, pitch refers to the distance between adjacent threads.

To determine the thread pitch, use the Swagelok pitch gauges and check the thread against each form until you find a match. It is intended to be used as a guide to help identify various threads. These connections allow products to be installed directly into piping or with the use of threaded fittings.

The female end has a straight thread and a smooth, flat surface. You find that the thread is straight. Identify the type of seal. See cut-out of table below. Note that it is common to jiss the thread diameter for different threads listed multiple times.

Measuring the Thread Diameters straight parallel. Thread and End Connection.

U.S. and International Threaded Connection Standards

The seal takes place between the taper in the male fitting and the globe seal nose. The counterbore is larger to help ensure the male end compresses the gasket into a sealing position.

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The leak tight seal is the reason most process instrumentation use tapered thread connections. Identify b2003 end connection. The male fitting has a straight thread and a spigot which fits through the ID of the gasket. If you prefer to narrow down the choices, use the following procedure: Thread standards are usually referenced in the end connection standard.

Log In Sign Up. Determine if the thread is T tapered or S straight parallel. Pitch Gauge A pitch gauge is used to identify the thread pitch.

T If the diameters increase for a male end or decrease for a female end, the thread is tapered. Therefore, to determine the pitch of the thread you would use your 20 and 24 pitch gauges. The female end has a straight thread and a flat, smooth surface. Tapered ISO Thread Gages Though Jks and NPT threads can look similar, they can never be used together, as they have different taper angles, root and crest, threads per inch, and pitch, b0023 would result in non-sealing fittings.

S If all the diameters are the same, the thread is Last 4th 1st Figure 1. Determine the thread pitch. At this point you know that the thread has the following characteristics: Since the thread is straight, turn to the Straight Thread Identification Reference Table on page 14, and locate the thread diameter.

T If the thread is tapered: If the centerline of the fitting and the longitudinal axis of the gauge are jiss, the seat angle and jie gauge angle are the same. The seal takes place by compressing the O-ring into the taper. Thread Flank Angle 2. See pages 20 through All threads have tolerances regarding many parts of the threads.


Pipe Gauge for Precision Inspection of Tapered Male Pipe Thread (JIS B0203)

The seal takes place between the taper in the male fitting and flared tubing or directly on the inverted flare seat. The female end has a straight thread and a taper to accept the O-ring.

The seal is designed to take place on the tapered thread. On the appropriate thread identification reference table, locate the nominal thread diameter.

Thread and End Connection | CYRIL LE CORSU –

Use a b020 to measure the nominal male or female thread crest-to-crest diameter on the first, fourth, and last full threads. The female end has an NPT thread and a smooth, flat surface. Threaded Connections Threaded connections are often referred to as a process connection type.

The globe seal nose may contain an O-ring. Use of a metal gasket is suggested. Function, material compatibility, adequate ratings, proper installation, operation, and maintenance are the responsibilities of the system designer and user.