[S&T Heat Exchanger] Pass Partition Thickness에 대한 API 660 및 TEMA 요구사항

Pass Partition Thickness 계산 시 고려해야 할 요구사항 정리 (API 660 / TEMA)

 

 

- (API 660) Para 7.4.2에 따라 Thickness는 C.A 값 2배에 추가로 3mm 더한 값보다 커야함.

- (TEMA) RCB-9.132 공식에 의해 Thickness 계산

- (TEMA) RCB-9.132 Min Thickness 확인(TEMA) RCB-1.518 : C.A는 미적용.

 

1. (API 660) Para 7.4.2

The pressure differential used to calculate the pass-partition plate thickness in accordance with TEMA, Section 5, Paragraph RCB-9.132 shall be at least twice the calculated pressure drop across each pass-partition plate. The plate thickness shall not be less than two times the tube side corrosion allowance, plus 3 mm (1/8 in.).

 

 

2. (TEMA) RCB-9.132

RBC-9.132 PASS PARTITION PLATE FORMULA

TEMA RCB-9.132

where

t = Minimum pass partition plate thickness, in. (mm)

B = Table value (linear interpolation may be used)

q = Pressure drop across plate, psi (kPA)

S = Code allowable stress in tension, at design metal temperature, psi (kPa)

b = Plate dimension. See Table RCB-9.132, in. (mm)

 

 

3. (TEMA) RCB-9.131

RCB-9.131 MINIMUM THICKNESS

 

The thickness of pass partitions shall not be less than the greater of that shown in Table

RCB-9.131 or calculated in Paragraph RCB-9.132. Pass partition plates may be

tapered to gasket width at the contact surface.

 

TEMA RCB-9.131

 

 

4. (TEMA) RCB-1.518

PASS PARTITION PLATES AND WELDED-IN LONG BAFFLES

 

Pass partition plates and welded-in long baffles are not required to have corrosion

allowance.