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"*

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