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 .
|Published (Last):||16 March 2017|
|PDF File Size:||2.84 Mb|
|ePub File Size:||9.3 Mb|
|Price:||Free* [*Free Regsitration Required]|
Measuring the Thread Diameters straight parallel.
Leave a Reply Cancel reply Your email address will not be published. At this point you know that the thread has the following characteristics: Select one of the gauges and place its angle against the seat angle of the end connection.
The globe seal nose may contain an O-ring. Selected special combinations of diameters, pitches, and lengths of engagement.
Pipe Gauge for Precision Inspection of Tapered Male Pipe Thread (JIS B0203)
On the appropriate thread identification reference table, locate the nominal thread diameter. The seal takes place by compressing a gasket between the male and female fittings.
T If the thread is tapered: Jid the centerline of the fitting and the longitudinal axis of the gauge are parallel, the seat angle and the gauge angle are the same. Log In Sign Up. To determine the thread pitch, use the Swagelok pitch gauges and check the thread against each form until you find a match. Pitch For the purposes of this guide, pitch refers to threads per inch, instead of the distance between the threads, for fractional screw threads and pipe threads. If the two pieces of metal are forced against each other without lubrication, galling jix possible.
Your email address will not be published. Enter b020 email address you signed up with and we’ll email you a reset link. The male end has a straight thread and an O-ring in a groove on the face of the fitting.
Thread and End Connection Identification Steps You have a male fitting and you need to identify its thread. For threaded connections there are two common types, 1. If jiss prefer to narrow down the choices, use the following procedure: The leak tight seal is the reason most process instrumentation use tapered thread connections. The female end has an NPT thread and a smooth, flat surface. Because the threads of the mating fittings are parallel to each other, there is no interference between the flanks, crests, and roots.
You find that the thread is straight. The male end has a straight thread and an angled shoulder. Straight Thread B02003 Tapered threads tighten to create a higher pressure fluid type seal. For each case, read across ji table to the pitch column to determine the possible thread pitches for your thread.
Note that it is common to have the thread diameter for different threads listed multiple times. Measured thread diameters may not match table measurements exactly.
Thread and End Connection | CYRIL LE CORSU –
The female end has a straight thread and a flat, smooth surface. The seal is designed jos take place on the tapered thread. Body Size 2 2. The male end has a straight thread and an O-ring. Tapered ISO Thread Gages Though ISO 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, which would result in non-sealing fittings.
Identify the end connection. The flanks compress against one another due to the b02003 taper as the fittings are attached. S If all the diameters are the same, the thread is Last 4th 1st Figure 1. Use a caliper to measure the nominal male or female thread diameter from crest-to-crest. Nominal thread diameter of 0.
Measure the thread diameter.
Note that a pitch gauge may be Unified threads per inchWhitworth threads per inchor metric millimeters per thread as marked on the back of each gauge form.
Depending on the application and materials, thread lubricant may be used. Thread Flank Angle 2. The counterbore is larger to help ensure the male end compresses the gasket into a sealing position.