profile 이승학 2006-07-24 17:06:53
1 281
밑에 글중에 공기압과 수압 압력시험을 할때

<ASTM code에 보면 압력시험에 있어서
수압은 설계압의 150%로
공기압은 설계압의 110%로 한다고 명시되어 있습니다>

된다고 하는데 이것이 ASTM CODE 어디에 나오는지
자세히 알고 싶습니다.

급하게 알아야 하니 빠른 답변 부탁드릴께여..

Thomas Eun 2006-07-24 21:17

Please find below.

Reference: Thomas J.C, Eun, ASME Section VIII, B31.3, and Section IX-Design and Construction Guidebook, Keyano College, 2005

Table Principle Concept of Hydrotest and Pneumatic Test in ASME Sec.VIII & I/B31.3

a. Codes
b. Hydrotest Pressure
c. Pneumatic Test Pressure
d. Main Purpose
e. Remark

1a. Sec.VIII, Div. 1 General
1b. 1.3 x MAWP x ST/S
1c. 1.1 x MAWP
1d. Pressure Test
1e. Detected by Deformation (Strain) and Cracking (Fracture) as well as leaking.

2a. Sec.VIII, Div. 1 Low Temperature, ULT-99
2b. 1.4 x MAWP x ST/S
2d. Pressure Test

3a. Sec.VIII, Div. 1 Cast Iron, UCI-101
3b. 2.0 x MAWP for MAWP>30psi, 2.5 x MAWP (bur max.60psi) for MAWP<30psi
3d. Pressure Test
3e. STD hydro Test

4a. Sec.VIII, Div. 1 Cast Iron, UCI-101
4b. PB/6/67 x (SMTS)/ (avg. T.S of test specimen)
4d. Pressure Test
4e. Hydrotest to Destruction

5a. Sec.VIII, Div. 2
5b. 1.25 x D.P x ST/S
5c. 1.15 x D.P
5d. Pressure Test

6a. Sec.VIII, Div. 3
6b. 1.25 x D.P x ST/S
6d. Pressure Test

7a. Sec.I
7b. 1.5 x D.P
7d. Pressure Test

8a. B31.3
8b. 1.5 x D.P x ST/S
8c. 1.1 x D.P
8d. Leak Test
8e. Detected by Leaking mainly at flanges gasket face, welds, fitting, bend parts, etc.

Abbreviations: D.P = design pressure, MAWP = maximum allowable working pressure, ST = stress value at test temperature, S = stress value at design temperature, PR (Test Pressure) = MAWP at operating temperatures listed in Table UCI-23, PB = destruction test pressure, SMTS = minimum specified tensile strength

Thomaseun@hanmail.net
1-832-351-6489

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