Pipe / R Thread Gauges (ISO 7/2)

Pipe / R Thread Gauges (ISO 7/2)

R / Pipe Threads are used in pipe assemblies where pressure tight joint is required on threads, without use of sealing compound.

Specification:

ISO Standard: Basic Dimensions : ISO 7/1 : 1994 & Gauging Practice : ISO 7/2 : 2000,,
BS & European standard : BS EN 10226 - 3 : 2005
Indian Standard : Basic Dimensions : IS 554 : 1999 & Gauging Practice : IS 8999 : 2003.

Manufacturing Range :

Taper Fullform Thread Plug - Gauge No.1
Taper Fullform Thread Plug with relief - Gauge No.2
Parallel Fullform Ring - Gauge No. 3
Taper Plain Ring - Gauge No.4.
Taper Modified Thread form Check Plug - Gauge No.5
Parallel Modified Thread form Check Ring - Gauge No. 6
Size Range covered is from pipe diameter 1/16" to 6". Above 6" & up to 12" Diameter gauges are manufactured as per
JIS B 0253 -1985 specification.

Diameter (Inch) TPI Type of Gauges used for checking
1/16" & 1/8" 28 Taper Full form Thread Plug Gauge Taper Full form Thread Plug Gauge with relief Parallel Full form Thread Ring Gauge Taper Plain Ring Gauge Taper modified Thread form Check Plug Gauge Parallel Modified Thread form Check Ring Gauge
1/4" & 3/8" 19
1/2" & 3/4" 14
1",1.1/4",1.1/2",2"' 11
2.1/2" ,3", 4", 5" ,6"*  
Sizes from 6” – 12” Pipe Diameter are covered in JIS B 0253-1985 specification, PT thread gauges. For details refer $ foot note 2.
Internal Threads Parameters to be checked Pitch Dia. with Major Diameter Accommodation Length
Taper Rc Gauges required - Gauge No.1 and/or 2 Gauge No.2
Parallel Rp   Gauge No.1 and/or 2 Gauge No.2
External Threads Parameters to be checked Pitch & Minor Diameters. Accommodation Length Major Diameter
Always Taper 'R' Gauges required - Gauge No.3 Gauge No.4 Gauge No.4

Details of Gauges as per ISO 7/2-2000