جوشکاری تعمیری

E 200 Repair welding procedures

201.Repair welding shall be qualified by a separate weld repair qualification test.

202.Preheat for repair welding should be minimum 50°C above minimum specified preheat for production welding.

203.When a heat treated pipe or component is repaired by welding, a new heat treatment may have to be included in the qualification of the weld repair procedure, depending on the effect of the weld repair on the properties and microstructure of the existing weld and base material.

204.Qualification of repair welding procedures shall be made by excavating a groove in an original weld welded in accordance with a qualified welding procedure.

شیار حفر شده باید طول کافی برای بدست آوردن تعداد مورد نیاز نمونه‌های آزمایشی + 50 میلی‌متر در هر انتها را داشته باشد.

205.The excavated groove shall be of sufficient length to obtain the required number of test specimens + 50 mm at each end.

Repeated repairs

206.If repeated weld repairs are permitted or agreed, these shall be qualified separately.

207.In case of repeated repairs, the test piece shall contain a repair weld of a qualified repaired original weld. For repeated in-process root repair, single pass cap repair and/or single pass root sealing repairs the repair weld shall be removed prior to re-repair.

Qualification welding

208 .The qualification test shall be made in a manner realistically simulating the repair situation to be qualified. 

209.Qualification welding shall be performed in accordance with E101 through E108.

210.For pipeline girth welds the repair qualification welding shall be performed in the overhead through vertical positions.

211.For roll welding the length of the repair weld may be centred at the 12 o’clock location for external repairs and at the 6 o’clock location for internal repairs, in which case repair welding is qualified for repair welding in these locations only.