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Job Specification
For
Silencer
DOCUMENT No.
A307-16-46-SP-6519
Rev. A
Page 4 of 5
4.11 The size and weight of the equipment shall preferably be kept minimum.
4.12 The silencer shall be provided with lifting lugs for ease of installation at site.
4.13 Allowable loads on Silencer Inlet Nozzle:
Wherever piping is connected directly to silencer nozzles local load analysis
calculations for shell/ head to nozzle junction to be carried-out as per WRC-107.
Allowable loading shall be considered as per doc no- A307-0IG-16-46-ST-0038.
Above loading are maximum. However in some exceptional cases if actual forces and
moment values due to connected piping are more, this will be intimated to vendor
during detail engineering. Vendor shall make necessary changes required for
strengthening the nozzles & the supporting brackets.
4.15 For Inlet Nozzle/ Flange, Drain Nozzle/ Flange: PMS attached in MR to be referred
inline with P&IDs.
For Gate Valve,: VMS attached in MR to be referred inline with P&IDs.
4.16 For IBR Silencer ( IV-LZ-212), approval of drawings, documents, stagewise inspection
and final certification of the equipment by Inspectorate of Boilers shall be included in
bidder’s scope. Complete design of equipment as per IBR shall be carried out by
vendor.
4.17 Bidder to furnish the unit rates for addition/ deletion of the items (support
brackets, nozzles, RF Pad, insert plate, nozzle flanges etc.) as per the doc. No.
A307-16-46-UR-6519 attached with MR. (for changes due to piping loads, over
and above those specified above, etc.).
5.0 INSPECTION AND TESTING
5.1 a) Equipment shall be inspected (stage wise & final) by EIL.
b) Quoted prices shall include for the above
5.2 Any or all the test, at purchaser's option shall be witnessed by purchaser / EIL.
However, such inspection shall be regarded as check-up and shall in no way absolve
the vendor of his responsibility.
5.3 Testing at Bidder's works shall include but not limited to the following.
Non-destructive tests such as Radiography, Dye Penetration Test etc. shall be
followed for testing the welds. As a minimum all pressure parts of the silencers shall
be spot radiographed as per ASME Code.
All fillet welds shall be DP tested.
5.4 Material certificates shall be furnished at the time of inspection.
5.5 The silencer shall be tested at site for a period of 20 minutes for determining the
guaranteed sound/Noise pressure level as specified in MDS under simulated
operating conditions. The silencer shall be tested at site in the presence of Bidder’s
representative and Bidder’s offer shall be deemed to include the same
Format No. EIL 1641-1924 Rev. 1
Page 185 of 291
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