CWI Part C_API 1104 (요약) R2
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"CWI Part C_API 1104 (요약)"에 대한 내용입니다.
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6. Qualification of Welders
General 6.1
welders shall be qualified 6.2∼6.8
test speciment 6.5
acceptance criteria 5.6
Company 감독 입회하에 진행
부분용접 6.2.1
필수변수는 Not identical
필수변수 for wleder qualification 6.2.2 & 6.2.3
Single qualification 6.2
General - a single weld procedure 6.2.1
When welder is qualifying in the fixed position.
horizontal, vertical, inclined from horizontal at an angle of not more than 45°.
Essential variables 6.2.2
welder requeirment 6.4, 6.5, 6.6
Scope 6.2.2
a Welding process
b Direction of Welding (uphill to downhill or vice versa)
c Filler metal : Group 1/2 to Group 3∼9 Table 1
d OD Diameter
* Less than 2.375 in. (60.3mm)
* 2.375 in. (60.3mm) ∼12.75 in (323.9mm)
* Greater than 12.75 (323.9mm)
e Wall thickness
* Less than 0.188 in. (4.8mm)
* 0.188 in. (4.8mm) ∼0.75 in.(19.1mm)
* Greater than 0.75 in.(19.1mm)
f Welding Position (requalification 필요없음)
* roll to fix, but fix to roll 가능 (requalification 필요없음)
* Butt weld → fillet welds 가능 (requalification 필요없음)
* butt weld in fixed position with axis inclined 45° → butt/fillet in all position 가능
g Joint design (i.e.- elimination of backing strip or change V to U bevel)
Multiple qualification 6.3
General - two or more weld procedures 6.3.1
First butt weld - OD at least 6.625 in. (168.3mm) / WT at least 0.025 in.(6.4mm) without a backing strip Fig. 12 (시편 따는 위치)
selected Fig. 12 without referene to the tope of the pipe. Table 3 - Butt welds 시편 개수
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