CRIMP GAS SYSTEM Technical Information

BUSH Crimp Gas is a complete Gas Plumbing system comprising of a multi-layer composite PE-Xb/al-PE-Xb (PEX-AL) pipe, a comprehensive range of Brass crimp fittings from 16mm to 63mm and tooling options in
both manual and Battery operation complete with reaming / calibrating tools and crimp gauges to ensure tool performance.

1. BUSH Crimp Gas PEX-AL Pipe

BUSH Crimp Gas composite pipe is manufactured from an inner and outer wall of crossed linked polyethylene material which is bonded on both sides with a middle layer of aluminium. The Pipe is yellow in colour and is clearly marked at 1m intervals detailing Brand, Type, Size, Class, Standard and Licence Number. The pipe has been tested and approved in accordance with the Australian Standard AS4176 / ATS 5200 under Licence number SMKP 21859 for gas Installation only using BUSH Crimp Gas fittings with the same corresponding Licence number

 2. BUSH Crimp Gas fittings
 

BUSH Crimp Gas fittings are manufactured to a very high standard from a solid brass forged process. Fittings have long engagement dual “O” ring Barbs with a Stainless Steel Crimp ring and a yellow plastic retainer with 4 engagement sighting holes. All fittings have stamped detail into their Stainless Steel Crimp Rings clearly
showing Brand, Size, Class, Standard and Licence Number. Identification Stamping also appears on the brass fitting where possible or it will display the letters EL. In addition all BUSH Crimp Gas Stainless Steel sleeves are identified with a yellow dot. BUSH Crimp Gas fittings have been tested and approved in accordance with the Australian Standard AS4176 under licence number SMKP 21859 for gas Installation only, using BUSH PEX-AL Gas Pipe with the same corresponding Licence number.

Pipe & Fitting Protection and Care during Handling and Installation:

BUSH Crimp Gas PEX-AL pipe and fittings must be protected from damage through all stages of the process from transport to storage and installation in accordance with AS5601.1:2010. Provision for pipe and fitting protection therefore includes but is not limited to the following:
• care must be taken to keep pipe free of grit, dirt, dust and foreign matter.
• care must be taken to ensure fittings are free of grit, dirt, dust and foreign matter and the yellow retainer is securely seated onto the fitting with the stainless steel crimp ring and dual “O” rings are seated correctly.
• Pipe must be protected from physical damage including cuts, abrasion, dents, kinks, tears, holes, etc.
• Pipe must be protected from long term or permanent U.V. exposure.
• Pipe and fittings must be protected from excessive heat or burning, (refer to maximum operating temperature detailed in Pipe specification section), chemical / solvent attack, animal or rodent attack, machinery damage, other external threats, etc.
• Chemical or corrosive environments. 1. Pipe needs to be protected. 2. Fittings must be wrapped and protected. This includes all underground installations for all fittings.
• Pipe support and clipping; both vertically and horizontally to ensure conformance for vibration, excessive tension, torsion or compressive stresses on fittings and pipe. Refer to pipe specification Chart for spacing.

• Pipe penetrations through timber and steel frames and concrete sections need to conform and may require protection using grommets, fire collars, sleeving or wrapping. Holes, notches and cutouts must be accurately drilled “in-line” to allow movement for any expansion or contraction of the pipe and fitting so engagements are not exposed to excessive stress. Refer to Pipe specification Chart for timber frame cut out limitations.
• Pipe Expansion and contraction needs to be accommodated during installation to allow for movement due to thermal Linear expansion. Failure to do so may exceed torsional pull out allowances on fittings resulting in a leak. Refer to Pipe specification Chart for the Thermal Expansion co-efficient.
• Pipe Bending; BUSH Crimp Gas PEX-AL pipe is flexible but requires care when bending to avoid kinks, cracks or other permanent deformation that may restrict flow or put undue pressure on joints. If the pipe is kinked, bent or damaged in any way it must be cut out and replaced. BUSH Crimp Gas elbows are recommended for tight bends and larger pipe sizes above 32mm. Refer to the Pipe specification Chart for minimum bending radius
and tools for bending.
• Connecting Barbs; when soldering connecting barbs, (male or female) first remove/dismantle the yellow plastic retainer ring, stainless crimp ring and two “O” rings, then, solder the brass connecting barbs – allow to cool before assembly. When assembling the fitting, ensure the yellow plastic retainer ring, the two “O” rings and the stainless steel sleeve are installed correctly. (Refer to picture on Page 9 of this brochure for assembly detail)

 

Nominal O.D. (mm) Colour Class Standard Licence Maximum Supported distance–Clipping Min Bending Radius by hand Min Bending Radius with Bending Spring

Coil

Sizes metres

Straight Length metres Coeffi cient of Linear (UOM) Thermal Expansion in mm per meter of pipe for every 10Deg C Temperature variation

Max Operating tempera ture

Max Operating Pressure
63 Yellow 500 AS4176/ ATS 5200 SMKP 21859 2.0m - - - 5m 0.26 80 Deg C 70 kpa
50 Yellow 500

AS4176/ ATS 5200

SMKP 21859 2.0m - - - 5m 0.26 80 Deg C 70 kpa
40 Yellow 500

AS4176/ ATS 5200

SMKP 21859 2.0m - - - 5m 0.26 80 Deg C 70 kpa
32 Yellow 500 AS4176/ ATS 5200 SMKP 21859 2.0m - 150mm 25&50 5m 0.26 80 Deg C 70 kpa
25 Yellow 500 AS4176/ ATS 5200 SMKP 21859 1.5m - 110mm 25&50 5m 0.26 80 Deg C 70 kpa
20 Yellow 500 AS4176/ ATS 5200 SMKP 21859 1.25m 100mm 60mm 25,50& 100 5m 0.26 80 Deg C 70 kpa
16 Yellow 500 AS4176/ ATS 5200 SMKP 21859 1.0m 80mm 50mm 25,50& 100 5m 0.26 80 Deg C 70 kpa
Timber Frame Plates and Studs 75mmwidetimber–maximumcut-out,notch,drilldiameterof19mm100mmwidetimber–maximumcut-out,notch,drilldiameterof25mm.
Timber Joists Refer AS5601.1:2010