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Articles
How is gas delivered to consumers
TianyiCNG 2016-06-02 16:24
| How is gas delivered to consumers? | |
| If to imagine that gas trunklines are the arteries of the gas transmission system, then gas distribution pipelines and household piping are its capillaries. | |
| Gas distribution | |
| If to imagine that gas trunklines are the arteries of the gas transmission system, than gas distribution pipelines and household piping are its capillaries. | |
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Stages of gas pressure reduction 11.8 MPa – pressure level inside gas trunklines running onshore |
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 Gas pressure is reduced to 1.2 MPa at gas distribution stations (GDS) on the way to consumers. |
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| Apart from reducing gas pressure, GDS and GRS maintain the required outlet pressure. Besides, at a GDS gas is also treated, dehydrated and odorized (specific smell is added to gas). | |
| Depending on a consumer category, there are different types of gas distribution pipelines: low pressure gas pipelines – for supplying gas to households, middle- and high pressure ones (Category I and Category II) – for conveying gas to industrial enterprises. | |
| Indoor gas piping | |
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Indoor gas piping is used to bring gas directly to a gas cooker. Indoor gas piping is laid from a building exterior to a connection point of gas equipment located inside. |
| Construction norms and rules | |
| All requirements applied to the gas transmission system are rigidly brought under regulation, and spelled out in the Construction Standards and Norms (so-called SNiP Standards). | |
| For instance, the Gas Distribution Systems SNiP Standard envisages that PVC and steel pipes must be used when laying underground gas pipes. For onshore and aboveground gas pipelines – steel pipes, for low pressure indoor gas piping – use of steel and copper pipes is allowed. | |
| Household gas equipment | |
| The gas supply chain, from a field to households, does not stop at the moment when gas is supplied to the indoor piping. Household gas equipment is an important link in this chain. | |
| Household gas equipment embraces all gas appliances located in a residential house, including gas cookers, hobs, ovens, hot water heaters, boilers, gas meters and gas piping of an apartment block or a residential house. | |
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Anyone can purchase any gas equipment to be utilized in the house – most importantly, it should be in compliance with the specifications. Only a representative of the specialized company authorized to work with such kind of equipment, may install and hook it up. Household gas equipment has to be serviced by a gas distribution organization which has an emergency service subunit (or has an agreement on providing emergency services). Household gas equipment is compulsorily checked once a year. Gasmen give one week notice before the check. It is better to wait for them; otherwise, there would be a chance for gas providers to halt gas supplies. Experts of Gorgaz (municipal gas supplier) and a regional gas company will also check readings of the gas meter and will make sure that the seal on it is not broken. |
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