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 .

Author: Faektilar Daishakar
Country: China
Language: English (Spanish)
Genre: Health and Food
Published (Last): 11 February 2013
Pages: 411
PDF File Size: 1.16 Mb
ePub File Size: 14.51 Mb
ISBN: 140-6-15907-814-1
Downloads: 29720
Price: Free* [*Free Regsitration Required]
Uploader: Maucage

The female end has a straight thread and a flat, smooth surface.

The seal takes place between the taper in the male fitting and the globe seal nose. Because the threads of the mating fittings are parallel to each other, there is no interference between the flanks, crests, and roots.

You find the thread diameter to be 0. There is no standard for torque or number of turns.

The complete catalog contents must be reviewed to ensure that the system designer and user make a safe product selection. Your email address will not be published. Consequently, the seal must be made with a gasket, O-ring, or some metal-to-metal contact.

The seal takes place by compressing a gasket between the angled shoulder and the flat, smooth surface.

U.S. and International Threaded Connection Standards

The male end has a straight thread and a straight shoulder. These connections allow products to be installed directly into piping or with the use of threaded fittings. The seal is designed to take place on the tapered thread.

Calibration of calipers is the responsibility of the end user. Selected special combinations of diameters, pitches, and lengths of engagement.


Try the appropriate pitch gauge form for the threads identified in Step b. Identify the type of jiss. The male end has an undersized NPT thread and an O-ring groove on the shoulder of the hex. A sealant is not required or recommended on straight threads. Thread Flank Angle 2. We will use the following definitions in this manual: Therefore, thread standards can be used to help define end connection standards. Thread and End Connection. Select one of the gauges and place its b02033 against the seat angle of the end connection.

Skip to main content. The seal takes place by compressing a gasket between the male and female fittings. Log In Sign Up.

Use a caliper to measure the nominal male or female thread crest-to-crest diameter on the first, fourth, and last full threads.

To identify the end connection, you: Leave a Reply Cancel reply Your email address will not be published. The globe seal nose may contain an O-ring. Locate the end connections that have the tapered thread you identified. Since the thread is straight, turn to the Straight Thread Identification Reference Table on page 14, and locate n0203 thread diameter.

The female end has a straight thread.

Measuring the Thread Diameters straight parallel. The male fitting has a straight thread and a spigot which fits through the ID of the gasket. Study the cross-section drawings for these end connections and determine which one matches your end connection. This gasket could be either all metal or metal with a bonded elastomer on the ID.

If the two pieces of metal are forced against each other without lubrication, galling is possible. The seal takes place between the taper in the male fitting and flared tubing or directly on the inverted flare seat. You find that the thread is straight.


JIS B 0203: Taper pipe threads

Tapered threads tighten to create a higher pressure fluid type seal. Contact your independent Swagelok representative for additional information. The flanks compress against one another due to the thread taper as the fittings are attached.

Look across the table to find the correspon- ding pitches. Remember me on this computer. Positive identification may not be possible without the use of an optical comparator. S If all the diameters are the same, nis thread is Last 4th 1st Figure 1.

A gland with a flat face is held against the body by a female nut that threads onto the body.

Pipe Gauge for Precision Inspection of Tapered Male Pipe Thread (JIS B) | ASADA | MISUMI USA

The female has a straight thread and a counterbore in the H0203 of the fitting to accept a gasket. The male end has a straight thread and an angled shoulder. The female end is a nut with a straight thread captured on a globe seal nose gland. Nominal thread diameter of 0.

The leak tight seal is the reason most process instrumentation use tapered thread connections. Determine the thread standard.