About SPK-Rifeng Gas

Transcription

1 About SPK-Rifeng Gas Rifeng Gas systems are New Zealand s most popular multilayer gas system. The multilayer pipe has an inner layer of aluminium with Pex either side making it a flexible, strong and oxygen impermeable conduit for both Natural Gas and LPG. SPK Rifeng Gas boasts the largest range of fittings on the market with sizes from 16mm OD to 50mm OD and is easy to install and crimp with high quality Stainless steel crimp rings. For extra safety all SPK Rifeng fittings have double O Rings on each insertion barb, ensuring a gas tight seal every time. SPK- Rifeng Gas systems carry SAI Global certification AS4176 Standards Mark and SGS certification also. SPK Rifeng gas systems carry a 25 year warranty and have a service life of 50 years +. Gas Pipe Diameter Wall Length & Code 16mm 2.0mm 5m RG16-5M 50m RG m RGC mm 2.0mm 5m RG20-5M 100m RG m RGC mm 2.5mm 5m RG25-5M 50m RG m RGC mm 3.0mm 5m RG32-5M 50m RG m RGC mm 4.0mm 5m RG40-5M 50m RG mm 4.5mm 5m RG50-5M REMS MINI PRESS TOOLS 16MM - 32MM A full range of Rems battery tooling is available on request, REMS Mini tools crimp sizes 16mm - 40mm MANUAL TOOLS 16MM - 20MM Manual tools are available also Rems Akku tools are required for 50mm. Please contact SPK industries or for a full list of Rifeng Tooling. 11.

2 Pipe Sizing Instructions All Gas installations should be sized correctly to obtain the required flow especially when the system is under full load. The installations must be installed by a licensed gasfitter and comply to AS/NZS5601.1:2013 This example uses Natural Gas with a meter pressure of 2.75kpa and a pressure drop of 0.75kpa Step 1 Draw a schematic of the pipe system and list all the gas data of the appliances. complete gas data in the sizing table (see back page) label each pipe run section using A-B-C format label the length of each run label the loads of each run Step 2 Add the mega joule rating of all the appliances. Example ( ) = 290MJ/h Refer to the Rifeng Gas sizing tables to calculate the pipe size of the longest run A-B + B-C + C-D (13m + 10m + 8m) = 31m Look up the table for the next highest length value (e.g. 35m) Refer to the mega joule rating of the Appliances (290MJ/h) Calculate the pipe size = 32mm Apply this pipe size to run (A-B = 32mm) Step 3 Calculate the length of each run: For the hot water service the calculations are: A-B + B-F (13m + 4m) = 17m Multiply the number of fittings (3) x the fitting equivalent Add the run length to the fitting allowance: 17m + 1.8m = 18.8m Look up the table at the next highest length value = 20m Look up the mega joule rating of the appliance (190MJ/h) Calculate the pipe size = 25m Apply this pipe size to B-F = 25mm Step 4 Repeat the above for each of the runs For the run B-C, the calculations are: A-B + B-C = (13m + 10m) = 23m Multiply the number of fittings (3) x the fitting equivalent Add the run length to the fitting allowance: 23m + 1.8m = 24.8m Look up the table at the next highest length value = 25m Add the mega joule rating of the remaining 2 x appliances (Space heater and Cook top) = 100MJ/h Calculate the pipe size = 20m Apply this pipe size to B-C = 20mm 12.

3 For the Cooktop run the calculations are: A-B + B-C + C-E= (13m + 10m + 6m) = 29m Multiply the number of fittings (4) x the fitting equivalent Add the run length to the fitting allowance: 29m + 2.4m = 31.4m Look up the table at the next highest length value = 35m Refer to mega joule rating of the cooktop appliance (30MJ/h) Calculate the pipe size = 16mm Apply this pipe size to C-E = 16mm For the Space Heater run the calculations are: A-B + B-C + C-D= (13m + 10m + 6m + 2m) = 31m Multiply the number of fittings (4) x the fitting equivalent Add the run length to the fitting allowance: 31m + 2.4m = 33.4m Look up the table at the next highest length value = 35m Refer to mega joule rating of the cooktop appliance (70MJ/h) Calculate the pipe size = 20mm Apply this pipe size to C-D = 20mm Pipe Section Gas Flow MJ/h Nominal Pipe Size No. of Fittings Used Length of Run (m) A-B mm NA 31m B-C mm m C-D 70 20mm m C-E 30 16mm m B-F mm m Step 1: Draw the Schematic F Hot Water Service 190 MJ/h Space heater 70 MJ/h D A Gas Meter 2.75 kpa Nat Gas 4m 13m 10m 8m C B E 6m Cook Top 30 MJ/h Pipe Sizing Instructions continued on page

4 (Natural Gas only) Rifeng Gas Sizing Charts 1 NATURAL GAS flow through PE-X/AL/PE-X Composite Pipe Crimped Fittings (MJ/h) Pipe Size Pressure Drop of 0.75 kpa (Meter Pressure 1.1kPa) Fitting Allowance (M) / / / / / / / / / / / / / / n/a (Natural Gas only) 1 NATURAL GAS flow through PE-X/AL/PE-X Composite Pipe Crimped Fittings (MJ/h) Pipe Size Pressure Drop of 0.75 kpa (Metre (Meter Pressure 2.75kPa) n/a n/a (LP Gas only) LP Gas flow through PE-X/AL/PE-X Composite Pipe Crimped Fittings (MJ/h) Pipe Size Pressure Drop of kpa (Meter Pressure 2.75kPa) n/a n/a (LP Gas only) LP Gas flow through PE-X/AL/PE-X Composite Pipe Crimped Fittings (MJ/h) Pipe Size Pressure Drop of 10.0kPa (Meter Pressure 70.0kPa) n/a n/a

5 Pipe Sizing Instructions Pipe System Schematic Gas Type: Pressure: Loss: 16.

6 Sizing Table Pipe Section Gas Flow MJ/h Nominal Pipe Size No. of Fittings Used Length of Run (m) Handling, Storage and Installation. UV radiation can damage plastic pipes, do not allow SPK-Rifeng pipes to be exposed to direct sunlight either before or after installation. Always protect pipes and fittings from damage either during transportation or storage, check pipes and fittings for damage before installation. All SPK Rifeng pipes may be installed underground in concrete or under buildings in a continuous run and without joints or fittings in accordance with the gas and building codes. Test SPK Rifeng Gas systems at 3 x working pressure and in accordance with the NZ Gas code, check crimps visually. Crimps should also be checked with a go-no-go gauge. SPK Rifeng Gas systems should always be installed by or under the supervision of a Craftsman Gasfitter. Rifeng Gas Pipe is rated to 1000kpa and Rifeng Fittings are rated to 75 C, however to comply with AS/NZS5601 this is limited to a maximum pressure of 70kpa. Ensure SPK Rifeng Gas pipes are protected from harmful conditions or situations including attack from rodents. 17.