All about British Thread Gauge

BSP thread gauge basically can be divided into parallel BSP and taper BSP. Here BSP means British standard pipe. These gauges are moreover used for connecting the pipes. In some occasions, these are also used for sealing the pipes. It was earlier referring to the standard called BS-2779. However, the modern standard referred to it is ISO. Each type of BSP thread gauge has its industrial purpose and application.

All these have their specifications as well. For example, the parallel thread gauges (BSPP) do come with a certain diameter throughout the entire body of the product. One of the distinguishing parts about these types of threads is that these don’t get stiffer upon being squeezed at a time. In fact, the diameter of taper threads (BSPT) also do alter by the dimension; it may increase or decrease.

Specification and applications

BSP thread gauge is known for its joints. BSP from connecting point of views may vary as per the requirement. For example, the joining threads are meant to add pressure or to develop the stiffness by connecting both the threads with each other. Size of the threads is decided as per the specific application. However, it is considered essential for ISO standard to be followed.

For example, the male threads are desired to be of taper as per these standards. The dimension of the threads can vary by the level of work. In advanced cases, it is preferred for the screw threads of longer size to be used. In such occasions, parallel threads are used on either side. The basic purpose of this approach is to provide a stiffer sealing of desired ring type. The best part about BSP is that here everything is quite fixed.

For example, BSP comes up with its standard that makes use of the thread pug gauges and the rings for the calibration purpose. In fact, the endurance level is checked on either of the threads one after the other. It can come in huge size ranges. However, it is always recommended that one should consult the technicians before selecting any specific gauge for a specific application. This is considered essential for the flawless engineer of threads.

Differentiating with NPT

Most people often confuse between BSPT and NPT. However, BSP and NPT are quite identical in general. The only difference is the angle between the flanks. In case of BSP, the angle is generally fifty-five degrees, which is 60 degree in case of NPT. This angle can be measured by separating the joint and calculating the angle in between the base to top, and the vice versa.

In fact, this difference is said to be the reason that the male NPT though connect with BSP well, but it doesn’t form proper sealing. Such types of fittings are pretty common in modern times. To be specific, these types of connections are mostly preferred for the imported equipment, for the highest level of precision. In most of the cases, the manufacturers make use of thread sealants for covering both the joints perfectly with each other.