Vent Hole In Reinforcing Pad

در زیر طبق استاندارد Asme B31.3 سوراخ تهویه یا خروجی گاز متصاعد شده در حین جوشکاری می بایست اعمال گردد و تاکید کرده بایستی هر گونه تعمیرات جوش بین اتصال پد و هدر قبل از نصب Saddle یا Pad انجام گیرد.

328.5.4 Welded Branch Connections

(g) Reinforcing pads and saddles shall have a good fit with the parts to which they are attached. A vent hole shall be provided at the side (not at the crotch) of any pad or saddle to reveal leakage in the weld between branch and run and to allow venting during welding and heat treatment. A pad or saddle may be made in more than one piece if joints between pieces have strength equivalent to pad or saddle parent metal, and if each piece has a vent hole. 

(h) Examination and any necessary repairs of the completed weld between branch and run shall be made before adding a pad or saddle.