string test for turbocompressor (complete unit test)
string test for turbocompressor (complete unit test)
(OP)
Hello everyone.
during the bidding stage we clarified that our turbocompressors shall be subject to a string test (complete unit test).
after selecting the contractor he said the following:
1) CA specify string test and does not specify full load string test.
2) Note that as per General specification for Gas Turbine Package 'Complete Unit Test' , does not specify full load test. The relevant API 616, 5th edn. clause specifies ' Complete Unit Test' as ' NO-LOAD' test
3) Vendor recommendation is no-load string test as the equipment are well proven models.
Hence the contractor has included No load string test.
what are your thoughts? is it true that not specifying the full load string test means no load string test?
during the bidding stage we clarified that our turbocompressors shall be subject to a string test (complete unit test).
after selecting the contractor he said the following:
1) CA specify string test and does not specify full load string test.
2) Note that as per General specification for Gas Turbine Package 'Complete Unit Test' , does not specify full load test. The relevant API 616, 5th edn. clause specifies ' Complete Unit Test' as ' NO-LOAD' test
3) Vendor recommendation is no-load string test as the equipment are well proven models.
Hence the contractor has included No load string test.
what are your thoughts? is it true that not specifying the full load string test means no load string test?
RE: string test for turbocompressor (complete unit test)
If the end user / buyer does not clearly state how the test is to performed (no load, part load or full load and scope, and numbers of units), nothing objects the contractor from doing no load test and claim to be in line with standards as far as the requirement of "complete unit test" applies. You may ask yourself, why would you mobilize a complete string arrangement of job units/ auxilliaries, with heavy impact on logistics and costs, to do a no load testing, which in facts is a costly mechanical running test. In a lump sum environment, this issue can get very nasty.
A mechanical running test with complete unit elements is already big overhead. On top of this, going for full load has absolutely huge consequences. If you are talking of a gas turbine, a full load test you do it on site otherwise (unless this is relatively small turbine) few facilities around the world can accomodate a full load string test at the factory, but it would be at very high cost (2~3 millions USD is not uncommon).
RE: string test for turbocompressor (complete unit test)