Standard No.:	EJ/T 1027.10-1996
English Name:	Welding code for mechanical components of PWR nuclear islands Repair of weld defects by welding
Chinese Name:	压水堆核电厂核岛机械设备焊接规范 焊接缺陷的补焊
Professional Classification:	EJ    Professional Standard - Nuclear Industry
Issued on:	1996-10-24
Implemented on:	1997-2-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	100.0
Delivery:	via email in 1 business day

Welding code for mechanical components of PWR nuclear islands Repair of weld defects by welding 1 Scope and applicability This standard specifies the technical requirements for the repair of weld defects by welding arising from the design, manufacture and installation of mechanical components of PWR nuclear islands. This standard is applicable to repair weld defects by welding of carbon steel, low alloy steel, austenitic stainless steel, nickel-based alloy welds and weld overlays. In case of inconsistency between this standard and equipment design drawings or corresponding technical specifications, the drawings and corresponding technical specifications shall prevail. 2 Normative references GB/T 3323 Methods for radiographic inspection and classification of radiographs for fusion welded butt joints in steel GB/T 11345 Method for manual ultrasonic testing and classification of testing results for ferritic steel welds EJ/T 1027.17 Welding code for mechanical components of PWR nuclear islands - Procedure qualification of repair welding for weld defects EJ/T 1027.16 Welding code for mechanical components of PWR nuclear islands - Hardfacing procedure qualification on valve EJ/T 1039 Code on non-destructive test for mechanical equipments In nuclear island of nuclear power plants 3 General provisions 3.1 For weld defects of products exceeding the acceptance standard, repair welding shall be carried out in accordance with this standard. 3.2 Common weld defects by welding are as follows: a. incomplete penetration; b. incomplete fusion; c. slag inclusion and tungsten inclusion; d. blowhole; e. crack; f. undercut; g. excessive penetration and pit; h. incompletely filled crater. 3.3 Repair welding may also be carried out for defects of base metal itself or defects not included in 3.2 by reference to this standard.

1 Scope and applicability 2 Normative references 3 General provisions 4 Times of repair welding 5 Implementation of repair welding 6 Non-destructive inspection on repair welding area 7 Repair welding record and report Additional explanation