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Barry Fleming
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Rheem Thermal Systems Group
Comment 01
Please provide your recommended change below.
Section / Subsection
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Preface
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Introduction
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Clause
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Appendix
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12
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See proposed change
Proposed change
In reviewing the proposed WMTS-528 it is noted that in a few sections it deviates from global testing standards such as PED and ASME.
Section: Appendix; Paragraph: B.2; Page 12
- A hydrostatic pressure test with 90º C water has been proposed.
- We suggest an alternative should be a hydrostatic pressure test with ambient or 20º C water
(in line with global standards like PED, ASME, UL, PED and KHK, all at 20°C)
Section: Clause; Paragraph: 9.3; Page 4
- A hydrostatic strength test at 1.5 times the maximum allowable working pressure has been proposed
- We suggest an alternative should be a hydrostatic or pneumatic strength test at 1.43 times the maximum allowable working pressure
(industrial PED standard)
Section: Clause; Paragraph: C.4; Page 14
- Maintain pressure for 30s has been proposed
- We suggest an alternative should be to maintain pressure for 5s and then helium leak test against a leak rate of 1,07 E-5
(Industrial standard utilized globally by most refrigeration companies to identify fine leaks)
Section: Appendix; Paragraph: B.2; Page 12
- A hydrostatic pressure test with 90º C water has been proposed.
- We suggest an alternative should be a hydrostatic pressure test with ambient or 20º C water
(in line with global standards like PED, ASME, UL, PED and KHK, all at 20°C)
Section: Clause; Paragraph: 9.3; Page 4
- A hydrostatic strength test at 1.5 times the maximum allowable working pressure has been proposed
- We suggest an alternative should be a hydrostatic or pneumatic strength test at 1.43 times the maximum allowable working pressure
(industrial PED standard)
Section: Clause; Paragraph: C.4; Page 14
- Maintain pressure for 30s has been proposed
- We suggest an alternative should be to maintain pressure for 5s and then helium leak test against a leak rate of 1,07 E-5
(Industrial standard utilized globally by most refrigeration companies to identify fine leaks)