standard specification for erection tender - GAIL

proto-type design or items not meeting provenness criteria specified above shall not be
offered.
1.2.4 All documentation submitted by the vendor including their quotation,
catalogues, drawings, installation, operation and maintenance manuals etc. shall be in
English language only.
1.2.5 Vendor shall also quote for
a) Two years' operational spares for each pressure relief valve and its accessories
which shall include nozzle, disc insert, guide pilot etc. as a minimum.
b) Any special tools and tackles needed for maintenance work. Vendor must certify
in his offer in case no special tools are necessary.
1.3 Drawing and data
1.3.1 Detailed drawings, data, catalogues and manuals required from the vendor are
indicated by the purchaser in vendor data requirement sheets. The required number of
reproducible, prints and soft copies shall be dispatched to the address mentioned,
adhering to the time limits indicated.
1.3.2 Final documentation consisting of design data, installation manual, operation and
maintenance manual etc. submitted by the vendor after placement of purchase order
shall include the following as a minimum :
a) Specification sheet for each pressure relief valve and its accessories
b) Certified drawing sheets for each pressure relief valve and accessories, which
shall provide dimensional details, internal construction details, end connection details,
weight and material of construction.
c) Copy of type test certificates.
d) Copy of test certificates for all the tests indicated in clause 4.0 of this
specification.
e) Installation procedure for Pressure relief valve and its accessories.
f) Calibration and maintenance procedure including replacement of internals
wherever applicable.
2.0 DESIGN AND CONSTRUCTION
2.1 Valve Design
2.1.1 The definitions of various terminologies used in purchaser's data sheets are as
per clause 1.2 of API RP 520 part I.
2.1.2 Unless specified otherwise, all pressure relief valves shall be full nozzle full lift
type and all relief valves in thermal safety application shall be modified nozzle type.
2.1.3 For flanged pressure relief valves, the valve inlet and outlet size, the orifice
designation and corresponding relieving area shall be as per API 526
2.1.4 The design of pressure relief valves in steam service under IBR design code shall
be governed by Regulation 294 and regulation 295 of IBR. However where design code
GAIL (INDIA) LTD
NEW DELHI
STANDARD SPECIFICATION FOR
PRESSURE RELIEF VALVES
SPECIFICATION REV-0
S-08-02-017
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