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[15] TECHNICAL DATA / CHEMICAL RESISTANCE CHART
Summary of threads for AAP Products
Fittings Thread Summary
Steel Fittings
Stainless Steel Fittings
Galvanised Malleable
Fittings
High Pressure Fittings
Unions Sockets
Other
Fittings
Unions Sockets
Other
Fittings
Unions Sockets
Other
Fittings
Unions Sockets
Other
Fittings
Female
Sealing
Taper
(RC)
Sealing
Parallel
(RP)
Sealing
Parallel
(RP)
Fastening
(G)
Fastening
(G)
Fastening
(G)
Sealing
Parallel
(RP)
Sealing
Parallel
(RP)
Sealing
Parallel
(RP)
Sealing
Taper
(RC)
Sealing
Taper
(RC)
Sealing
Taper
(RC)
Male
Sealing
Taper
(R)
N/A
Sealing
Taper
(R)
Sealing
Taper
(R)
N/A
Sealing
Taper
(R)
Sealing
Taper
(R)
N/A
Sealing
Taper
(R)
Sealing
Taper
(R)
N/A
Sealing
Taper
(R)
Valve Thread Summary
DR Brass Ball
Valve
Gas Ball Valves
General
Purpose Ball
Valves
Gate Valves
Check’s and Strainers
General Purpose Stainless Steel
Female
Sealing Parallel (RP) Sealing Parallel (RP) Fastening Parallel (G) Sealing Parallel (RP) Fastening Parallel (G)
Fastening (G)
Male
Sealing Taper (R)
Sealing Taper (R)
Fastening (GB)
N/A
N/A
N/A
Thread Specifications
AS1722 – Pipe Threads of Whitworth Form
AS1722 Part 1: Sealing Pipe Threads
Connections intended to be pressure-tight by way of a ‘sealing pipe thread’, shall comply with the relevant requirements of
AS1722.1 or IS0 7.1
External Thread – Series R (External Taper Pipe Thread)
External Thread – Series RL (External Parallel Long screw Thread)
Internal Thread – Series RC (Internal Taper Pipe Thread)
Internal Thread – Series RP (Internal Parallel Pipe Thread)
N.B Except for the method of designation, the external taper pipe threads and internal pipe threads given in this standard
are in agreement with ISO 7. In response to a demand from the Australian industry the long screw thread is included in this
standard, but is not given in ISO 7.
AS 1722 Part 2: Fastening Pipe Threads
Connections intended to be compression joints, such as union couplings and compression connections utilizing a “fastening
pipe thread” to effect the connection, shall comply with the relevant requirements of AS1722.2 or ISO 228.1
External Threads – Series GB (Parallel Class B Tolerance)
Internal Threads – Series G (Parallel)
N.B This standard is technically equivalent to ISO 228
ISO 7 – Pipe Threads where pressure joints are made on the threads
ISO 7 Part 1: Dimensions, Tolerance and designation
ISO 7 Part 2: Verification by means of limit gauges
ISO 228 – Pipe Threads where pressure Joints are not made on threads
ISO 228 Part 1: Dimension, Tolerance and Designation
ISO 228 Part 2: Verification by means of limit gauges
** For further clarification please refer directly to the standard
