Country House Communities
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System of a country house community gas supply includes the following:
- Reservoirs for LPG storage (under ground and above ground);
- LPG evaporating plants (electrical or liquid);
- Pumping device for LPG pumping from gas carrier to reservoir.
- Self-priming plant for LPG liquid phase supply from reservoir to evaporator of 200 kg/h capacity;
- System of anode-cathode protection;
- Fittings for high pressure gas pipeline mounting;
- Pumping station electric control board;
- Explosion safe device VUUK-UZA-3V for a tank-car earthing and static electricity relief at LPG unloading.
- Insulating flanges at gas pipeline input and output from ground;
- Filter at suction gas pipeline;
- Back pressure valve and relief valve at by-pass
- Metal supports and above-ground gas pipelines for LPG (to prevent load transfer from pipelines to pump flanges)
- electromagnetic explosion safe cut-off valve located at a gas pipeline entrance. This valve cuts off LPG supply when LPG pressure drops below 0,5 MPa or gas content in a shop premises reaches 20% of Low Flammability Level. Gas content sensor connected with electromagnetic valve. Sound alert.
- Metal grid on concrete poles of 1,6 m height with a gate used for reservoirs fencing in.
- Intrasite network of automated equipment, pump cables and external lightning cables (laid in trenches): three phase five wire with cupper core and one phase three wire in compliance with GOST P50571.-93;
- External lightning: external lightning support: explosion safe lamp of VZG200-AMC type, distribution board with automatic switching of external lightning power;
- Metal lightning rod;
- Earthing circuit:
- reservoirs earthing circuit;
- artificial earthing device - Local low-pressure gas-pipeline with branches to each house.
- Condensate tanks every 100 m of gas-pipeline.
- Gas meters in compliance with number of houses supplied
- Under ground locks ensuring gas supply cutting off for non-payers.
Documents required for system design realization
- Right of way certificate (or cadastral documents certifying proprietary rights for land lot).
- Tracing of a land lot for construction general layout of M 1: 2000 with land lot borders marked.
- Topo-survey M 1:200, 1:500, registered at land cadastre bodies two years old max. with geodesic company stamp.
- Geotechnical investigation of a land lot.
- Construction permit issued by local administration
- Architectural planning assignment.
- Technical specifications:
- Issued by gas supplying (operating) organization;
- Issued by Civil Defense and Emergency Situations bodies;
- for electric supply specifying connection points of required capacity; - Project statement
- Face of building to which gas pipeline is being laid.
- Pipeline entrance affixment to building axes.
- First floors layout with gas equipment supposed location.
- Certificates in Russian language for all installed gas-consuming equipment
- Certificate of Conformity and Permit to Use in Russia for all installed gas-consuming equipment
SNiP (construction norms and specifications) 2.04.08-87* “Gas supply”
SNiP 2.04.05-91* “Heating, Ventilation and Air Conditioning”
SNiP 2.08.01-89* “Dwelling Houses”
SNiP II-89-80 General layouts of industrial enterprises
SNiP 2.11.03-93 Storage facilities for oil and oil products. Fire safety norms.
SNiP II-35-76 Boiler plants. Norms of design
SNiP 11-98* Refueling stations. Fire safety requirements.
SNiP 42-101-2002 Design and construction of gas pipelines made of polyethylene tubes and worn out pipelines reconstruction.
GOST 5542-87 “Combustible natural gases for industrial and public use. Technical specifications”
SR 12-609-03 Safety requirements for objects using liquefied hydrocarbon gases
SR 12-529-03 Safety requirements for systems of gas distribution and gas consumption.
SR 03-576-03 Requirements for safe operation of pressure vessels.
SP 42-101-2003 General Norms of design and construction for gas distributing systems made of metal and polyethylene tubes.