1. G is for cylindrical and R is for tapered.

Use Rc for conical female threads; use Rp for cylindrical female threads; use R for conical male threads.

The non-sealed pipe thread G needs to be wrapped with raw material when the receiver is used for water or gas sealing; the sealed pipe thread Rp does not need to be wrapped with raw material when the receiver is used for water or gas sealing

 Rc Rp R are all imperial threads, where Rc means conical female thread, Rp means cylindrical female thread, and R means conical male thread, and their thread angle is 55 degrees.

PS3/4 thread:

Sealed pipe threads have two functions: sealing and mechanical connection, while non-sealed pipe threads have only mechanical connection.

ps is the normal straight pipe thread 3/4 is a 14 tooth thread and PT is a tapered pipe thread 

W is the Whirlpool thread, and 1/4 BSP is also called Wicker thread.

BSP is a general designation for British pipe threads, but there are three types: BSPP, BSPT, and BSPF. BSPP (British Standard Pipe Parallel (thread)) is a designation for British cylindrical pipe threads, with only internal threads, equivalent to the domestic 55-degree cylindrical (parallel) pipe thread, i.e., G, while BSPT (British Standard Taper Pipe Thread) is a designation for British cylindrical pipe threads. BSPT (British Standard Taper Pipe Thread) is an imperial taper pipe thread standard, which means that the thread angle is 55 degrees. The thread has a taper of 1:16, which is equivalent to the domestic 55-degree taper pipe thread, ZG, and BSPF (British Standard Pipe Fine Hand Taps) is the British Standard Fine Hand Pipe Thread; the first two are used for sealing joints, and the latter one is used for general joints.

What is the difference between G3/4-16 and PS3/4-16 threads?

I know that one is a mechanical bond and the other is a sealing bond. But are their taps the same. Just the small diameter is different? Can you replace the G3/4 or PS3/4 threads, which are generally 14 threads, or is this 3/4-16 thread a special type of thread? The precision of the bite is higher, so it is the same 3/4-16, but for different purposes, so it is not a substitute.

1. BSP is a British Pipe Thread. Tr., BSP.PI., BSP. , b7 C' 6 L4 r( [ p! ? + Tr. is a tapered pipe thread used for sealing joints, BSP.PI. is a parallel pipe thread used for sealing joints with only internal threads, which is embedded with the external threads of BSP. It is not possible to work with BSP alone. It is better to check in detail. Otherwise, if you leak oil or gas or something, you will be in big trouble.

2. Thread G and Thread BSPP 

The same as thread BSPP, both are imperial cylindrical pipe thread designations.

3. How many types of threads are there in the British system, and what are the characteristics of BSP threads and how are they expressed? 2 E# c! g) t: J9 g; xTwo types, BSPP (pipe thread) and BSPT (55 degree angle tapered pipe thread, as opposed to the US 60 degree angle tapered pipe thread NPT, which are not compatible with each other)

4, G thread and Rp thread comparison, what is the same, what is different, is there a difference in the use of the two, can be common. % z' g7 E0 o1 d, n5 ^& L7 J: p

The G thread and the Rp thread are both 55° cylindrical pipe threads. It's just that the country (organization) is different and has a different designation.

G is the designation for China, France, the former Soviet Union, and Japan; 4 r; s: a/ P8 V5 v- }# b7 O

PF is the Japanese code name; + h8 j A) N7 A

BSP, BSPP are British designators; ( r, g4 R; g4 F

R, K is the German designation (R is the female thread, K is the male thread);

TPYБ is a Soviet designator; + O& V5 _/ s o$ y

Rp is an ISO designator.

5. What is the difference between 1/8 and NPT1/8 threads?

 It should be the national standard now, but the old standard of NPT is called Z, which is a 60-degree tapered pipe thread with thread seal, national standard number GB/T12716-2002M, and G is a 55-degree non-thread seal cylindrical pipe thread (PF is the same as G for non-sealed pipe thread, PS for sealed pipe thread), national standard number GB/T3707-20013 F9 ] a* S; v2 e7 o

6. Is the English code for British Standard Pipe Thread BSP? Does it have a taper?

 The designation should be G, cylindrical pipe thread, no taper

8、What is the difference between Rp thread and G thread, and can they be used instead of each other?

Also: What is the difference between Rp and Rb, and can they be used in place of each other?

Pipe threads

The characteristic designation is G. * a1 L1 Y0 k( |)

G1/2 indicates a cylindrical female pipe thread; ( H- u% {4 n) Q% ~& ]

G1/2A indicates a cylindrical male pipe thread.

Pipe threads used for thread sealing.

Rp - indicates cylindrical female pipe thread; - A7 F% U9 D: r ~/ {! b4 I

Rc - indicates conical female pipe thread; $ @+ R: P+ n* [1 @) M" K

R - indicates tapered male pipe threads.

Examples of thread designations:1 p _4 y' `+ ?3 T$ K5 ~* j2 ^

G1/2-LH indicates a non-thread-sealed, left-handed female thread with a 1/2 in. size designator. / J: Y" i0 m$ O7 ]" ]

RP and RB are not interchangeable because one is a 55-degree thread and the other is a 60-degree thread 3 j0 j) `. W, f: ^

9. Information: (Most of the previous remarks are based on this article): n: Y' w$ C0 A# q! V% ^, j

Part II Pipe thread specifications and tools Preface Pipe threads are commonly used in water, gas, oil pressure systems, etc., where we cannot see in our lives. They are also used for applications such as dense, mechanical, and oil well pipes, and are gradually being adopted for specialized use. If there is a mistake in the use, it can lead to a major accident such as gas leakage or leakage. This article explains the proper use of pipe threads, the proper use of related tools (screw taps, screw dies), and the method of checking accuracy with thread gauges, etc. 1. The thread angle of the imperial system is the same as that of the Wechsler thread, which is 55. The American system is used for all threads with the first letter N 

These American threads are not adopted by JIS or ISO, but are used in various places for various purposes under the name of American pipe thread. The metric system was established in 1954 by West Germany in DIN 158, and the reference diameter and pitch are the metric system dimensions, but they are not commonly used in general. 2. The name of the thread is the symbol of the thread, and the type of thread is the combination of the two. (BSP.PL) ( ) Positive external thread is PT (positive external thread is BS,PTR.) 8 Y5 y: B7 r' u. r1 a$ E5 d For mechanical bonding Pipe parallel thread (BS Pipe parallel thread) PF (BSP.F.) ( ) ( ) ( ) 6 x" f. n& l7 H: _4 p: A* n! C4 r+ y

10, remarks (reference): : [' o% T( 3 {; n/ z

British BSW, BSP Whitworth thread, British BSPT tapered pipe thread can also be used British thread standard BSP Whitworth thread, that is, our cylindrical pipe thread G! [' b3 g( Z9 l" o

G (BSP) non-thread-sealed pipe threads

BSP pipe thread is without taper, equivalent to the national standard pipe thread G. 

BSP imperial pipe thread, specification bs 21.2779. Tooth angle: 55 degrees

BSPP threads are 55° cylindrical pipe threads, which are generally hand machined, G is our national pipe thread designation 7 w* K# h" l& c. h) l

BSPP, pipe thread with thread seal; BSPT, tapered pipe thread with thread seal; ISO standard uses BSP thread, China uses ISO standard.

The ISO standard uses the BSP thread, the Chinese standard uses the ISO standard, find the Chinese standard is! i.e. GB/T 7306-1987. 0 y4 ~4 k0 g) N/ K! N! Q

BSP is the British standard equivalent to the national standard pipe thread G. & Y" m$ Y! C, z% G! B0 Y. }& @/ l1 x

BSPP (i.e. PF) British Standard Straight Thread, BSP refers to a British Standard Pipe Thread, which is a 55 degree angle

I understand this to mean. 

Non-sealed pipe thread G is used for water and gas sealing.

Sealed pipe threads Rp are used for water and gas sealing without wrapping raw material.

Pipe threads are generally divided into non-thread-sealed pipe threads and thread-sealed pipe threads. 

Non-threaded pipe threads are cylindrical pipe threads that are not sealed by the threads themselves. Non-sealed pipe threads are used for water and gas piping, lubrication and electrical piping systems with a pressure of 1.57MPa or less. 

Sealed pipe threads are threaded pipe threads that are sealed by the threaded substrate itself. Sealed pipe threads are used for high-temperature and high-pressure systems and lubrication systems. 

Pipe thread markings: 

(1) Pipe threads sealed with threads include conical male threads, conical female threads and cylindrical female threads. There are two forms of coupling: conical female thread and conical male thread; cylindrical female thread and conical male thread fit. 

The thread feature designators are Rc for tapered female threads, Rp for cylindrical female threads, and R for tapered male threads. The size designators are 1/2, 3/4, 1, 11/2, and ....... When the thread is left-handed, add LH; right-handed threads are not marked with a rotation designator. When internal and external threads are assembled together, the marks for internal and external threads are separated by a slash, with the left side indicating internal threads and the right side indicating external threads. For example, if a cylindrical female thread is fitted with a conical male thread (right-handed), the markings are Rp3/4 /R3/4. 

(2) Non-threaded pipe threads. The marking format is as follows: Thread feature designator Size designator Tolerance class designator - Rotation designator Thread feature designator is indicated by G. The size designators are expressed as 1/2, 3/4, 1, .... The thread tolerance class code: external threads are marked in two levels, A and B; internal threads are not marked. When the thread is left-handed, LH is added at the end. When internal and external threads are assembled together, the markings for internal and external threads are separated by a slash, with the left side indicating internal threads and the right side indicating external threads. For example, G11/2 / G11/2B, Rc indicates a conical female thread; Rp indicates a cylindrical female thread; Rc Rp R indicates a conical male thread.

NPT threads are American threads with a 60-degree thread angle. Non-sealed pipe threads do not have a taper; sealed pipe threads have a 1:16 taper, which can be found in the manual.