PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

Workmanship:
Workmanship and general finish shall be of first class commercial quality and in
accordance with best practice. All covers, flanges and joints shall be properly
faced, bored, fitted, fixed, hollowed, mounted or chamfered as the case may be,
according to the best approved practice and all working parts of the plant and other
apparatus, shall similarly be well and accurately fitted, finished, fixed and adjusted
Castings and Metals:
All castings shall have an homogenous structure and be free from blowholes, flaws
and cracks. Any casting having a thickness in parts in excess of 3 mm to that which
it is purported to be shall be rejected. No repairs or patchwork to castings shall be
allowed other than that approved by the Engineer.
Castings subject to hydraulic pressure shall be tested to 1.5 times the maximum
working pressure. Certified copies of Test Reports shall be forwarded to the
Engineer as soon as the test is completed.
Where not otherwise specified steel castings shall be selected from the appropriate
grade as per relevant IS.
All grey iron castings supplied shall be to the appropriate grade of IS:210. The
Contractor shall replace any casting which the Engineer considers is not of first
class appearance or is not in any way the best which can be produced, although
such a casting may have passed the necessary hydraulic or other tests. No plugging,
filling, welding or "burning on" will be acceptable
All spheroidal graphite or modular graphite iron shall be to the appropriate grade of
IS.1865.
Where not otherwise specified the bronze used shall be made of a strong and
durable zinc free mixture as per relevant IS:318.
GTS : General Technical Specification. Page 141