IS 4721 : 2014 Code of Practice for Drainage and Dewatering of Surface/ Underground Hydroelectric Power Stations

Reaffirmed 2019

1 SCOPE

1.1 This standard stipulates requirements for drainage and dewatering arrangements for water discharges for surface/underground hydroelectric power station.

1.1.1 The general drainage of the power house building shall, however, be done in accordance with IS 1742 and IS 1172 except that some special features peculiar to a power house building have been dealt in this standard.

2 REFERENCES

The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.

554 : 1999 Pipe threads where pressure-tight joints are made on the threads — Dimensions, tolerances and designation (fourth revision)

778 : 1984 Specification for copper alloy gate, globe and check valves for water works purposes (fourth revision)

1172 : 1993 Code of basic requirements for water supply, drainage and sanitation (fourth revision)

1239 (Part 1) : 2004 Steel tubes, tubulars and other wrought steel fittings — Specification : Part 1 Steel tubes (sixth revision)

1742 : 1983 Code of practice for building drainage (second revision)

3589 : 2001 Steel pipes for water and sewage (168.3 to 2 540 mm outside diameter) — Specification (third revision)

14846 : 2000 Sluice valves for water works purposes (50 to 1 200 mm size) — Specification