SNiP 2.04.08-87

СНиП на английском языке SNiP 2.04.08-87*

Laying gas pipelines in relation to underground railways shall be
designed in accordance with the provisions of SNiP 2.07.01.89. Within the territory of industrial facilities external gas pipelines shall, as a rule, be laid above ground in accordance with the requirements of SNiP II- 89-80.
4.4* Selection of underground gas pipeline route shall take into account
corrosive activity of soils and availability of ground currents in accordance
with the provisions of GOST 9.602—89.
4.5.* Gas pipeline input into residential buildings shall be designed at
non-residential premises accessible for pipeline inspections. In existing
privately owned residential houses gas pipeline can be input to residential
premises where a heating furnace is installed, provided shut-off device is
located outside the building.
Gas pipeline inputs to public buildings shall be made directly to the
premises where gas appliances are located, or to passages.
Shut-off devices shall, as a rule, be located outside buildings.
4.6. Gas pipeline inlets to industrial facility buildings of other production
structures shall be designed to directly enter the premises where gas
consuming equipment is situated or adjacent premises, provided the two
premises are connected by an opening. At least triple air renewal shall be
ensured in the adjacent premises.
4.7. Gas pipeline inlets shall not pass through or under foundations of
buildings. In let and outlet GCS pipelines can traverse foundations.
4.8. Gas pipeline outlets to technical basements or corridors or routing
throughout such premises in residential buildings and public structures shall be allowed only in case low pressure external feed pipes are tun into them inside gridiron channels.
4.9. Gas pipelines cannot be input into basements, elevator pits, ventilation chambers, trash chutes, transformer substations, distribution devices, engine rooms and storage rooms rated explosion or fire hazard of Category Ah and Beh.
4.10. Input design shall conform with the requirements of Items 4.18 and
4.19.

4.11. Steel pipe joints shall be welded. Detachable joints (flanged or threaded) shall be designed in stop valve installation zones, on condensate accumulators and hydraulic locks and at connection points of contol and measuring instruments or electrical protection devices.

4.12. Detachable gas pipeline joints cannot be designed underground.

UNDERGROUND GAS PIPELINES

4.13. Minimal horizontal distances from underground and ground-level (mound) gas pipelines to buildings (except GCS) and installations shall be designed in accordance to the requirements of SNiP 2.07.01-89. The said distances from GCS buildings to input and output gas pipelines are not subject to regulation. The distances stipulated by SNiP 2.07.01-89 can be reduced by up to 50% in case gas pipeline pressure is below 0.6 MPa (6 kgf/cm2), when pipelines are laid between buildings or under arches, in congested conditions as well as distances from pipelines with pressure above 0.6 MPa (6 kgf/cm2) to detached non-residential or auxiliary buildings.
In such cases, in the reduced distance zones and 5 m in each direction
from those zones the following stipulations shall be made:
Application of seamless or electrically welded pipes subjected to 100%
NDT inspection of welded joint or laying in encasement electrically welded
pipes that were not subjected to such inspection; control of all welded joints by non-destructive testing.