[열교환기] Tube Hole에 대한 TEMA 요구사항

Tube Hole Size 정하기 (TEMA)

 

1. Tube hole을 Tube OD + 0.8mm로 적용해야 하는 Case

- Max. unsupported tube length가 914mm 이하일 때

- Tube Diameter가 31.8mm 이상일 때

 

2. Tube hole을 Tube OD + 0.4mm로 적용해야 하는 Case

- Max. unsupported tube length가 914mm 이상일 때

- Tube Diameter가 31.8mm 이하일 때

 

 

(TEMA) RCB-4.2 TUBE HOLES

Where the maximum unsupported tube length is 36 in. (914 mm) or less, or for tubes larger in

diameter than 1-114 in. (31.8 mm) OD, standard tube holes are to be 1/32 inch (0.8 mm) over the

OD of the tubes. Where the unsupported tube length exceeds 36 in. (914 mm) for tubes 1-114 in.

(31.8 mm) diameter and smaller, standard tube holes are to be 1/64 inch (0.4 mm) over the OD of

the tubes. For pulsating conditions, tube holes may be smaller than standard. Any burrs shall be

removed and the tube holes given a workmanlike finish. Baffle holes will have an over-tolerance of

0.010 inch (0.3 mm) except that 4% of the holes are allowed an over-tolerance of 0.015 inch (0.4

mm).