SL 35-1992 Hydraulic Metal Structure Welder Examination Rules SL 35-92 SL35-1992 Standard download decompression password: www.bzxz.net

Industry Standard of the People's Republic of China
SL35—92
Examination Rules for Hydraulic Metal Structure Welders
Published on May 30, 1992
Ministry of Water Resources of the People's Republic of China
Implementation on September 1, 1992
Subject Content and Scope of Application
Cited Standards
Welder Examination Committee
Supervision of Welder Examination…
Qualification of Welders Taking the Examination
Examination Materials
Examination Content and Methods
Testing and Evaluation
Re-examination and Re-examination…·…
Compliance Qualification Certificate
Appendix A
Appendix B
Appendix C
Appendix D
Format of welder qualification certificate
Format of welder examination registration form,
Format of welder examination record summary form·
Conditions for welder to extend qualification certificate without examination, Title
Subject content and scope of application
Industry Standard of the People's Republic of China
Examination Rules for Welders of Hydraulic Metal Structures
This standard specifies the technical examination of welders engaged in manual arc welding (hereinafter referred to as manual arc welding) and submerged arc automatic welding (hereinafter referred to as submerged arc welding) of carbon steel and low alloy structural steel. This standard applies to the technical examination of welders engaged in the manufacture and installation of hydraulic metal structures in water conservancy and power systems; it also applies to the technical examination of welders engaged in the manufacture and installation of steel structures of other mechanical products in water conservancy and power systems. The technical examination of welders of gas shielded arc welding shall be conducted in accordance with this standard. ?
Referenced standards
GB3323 Radiography and quality classification of steel fusion welded butt joints GB2653 Bend and flattening test methods for welded joints 3
Welder Examination CommitteebZxz.net
3.1 Enterprises that meet the following conditions may establish a welder examination committee and apply to the competent authority for approval. a. Welding engineers or welding technicians and radiation personnel with Grade II qualifications or above that are suitable for their work. b. Sites, equipment and measuring tools that can meet the requirements of welder examinations. c. A feasible management system.
For enterprises that do not meet the above conditions, the welder examination work may be entrusted to other welder examination committees by the competent authority. 3.2 The welder examination committee shall be composed of the following personnel: a. Chief Engineer; b. Welding Engineer or Welding Technician; c. Representatives of the technical inspection department and radiation personnel with Grade II qualification or above who are suitable for their work; d. Representatives of the education and labor and capital departments; e. Welders holding operation instructor qualification certificates or experienced welder representatives. The chief engineer shall be the chairman, and the welding engineer or welding technician shall be responsible for the specific work of the examination. 3.3 Responsibilities of the welder examination committee: Review welder qualifications; determine the application category and basic knowledge examination questions; preside over the examination work and evaluate the examination results; handle welder qualification certificates and exemption visas for certified welders; handle the revocation of welder qualification certificates; preserve and manage welder technical files.
Supervision of welder examinations
4.1 Supervision of welder examinations shall be carried out by the competent department. 4.2: The main contents of the supervision of welder examination are: reviewing the examination content and test questions; reviewing the welder's qualifications; checking whether there is a welding process instruction book; supervising the welding and evaluation of the test pieces: issuing welder qualification certificates and exemption visas for certified welders. Welder qualifications for taking the examination
5.1 Welders who meet one of the following conditions may apply to take the examination. Approved by the Ministry of Water Resources of the People's Republic of China on May 30, 1992 and implemented on September 1, 1992
SL35-92
a. Welders who have received professional welding training at technical schools or above and are currently engaged in welding work; b. Welders with a junior high school education or above or equivalent education and more than one year of welding experience 5.2 Manual welding welders can apply to take the plate welder examination or pipe welder examination according to the actual scope of work they are engaged in. 5.2.1 Welders who take the operation skill examination for the first time should do it one by one. 5.2.2. Welders who apply for plate type examinations must pass the qualification examination for plate type I (flat welding); welders who apply for pipe type examinations must pass the qualification examination for pipe type IP (horizontal rotation flat welding). 5.2.3 Welders engaged in pipe welding should be tested according to test piece form B. When the outer diameter of the pipe is greater than or equal to 600mm, it can be tested according to plate type.
5.2.4 Welders engaged in single-sided welding and double-sided forming structure welding of plates should be tested according to test piece form B; welders engaged in double-sided welding of plates, backing welding and fillet welding can be tested according to test piece form A. The specific test piece form to be used shall be determined by the welder examination committee based on the production needs of the enterprise and the work that the welder will be engaged in. Note: A indicates the use of backing welding test pieces;
B indicates the use of single-sided welding and double-sided forming test pieces. Welders who apply for submerged arc welding examinations should first obtain the qualification for manual arc welding plate type I examination. 5.3
Test materials
6.1. Test materials shall comply with the relevant provisions of national standards and can only be used after being identified as qualified by the welder examination committee. 6.2 Whether the materials used for the test pieces of manual arc welding plate and submerged arc welding and the welding backing are carbon steel or low alloy steel shall be determined by the welder examination committee based on the actual situation of the materials used in the enterprise's production products. 6.3 The materials of the test pieces of manual arc welding pipes shall be hot-rolled or cold-drawn seamless steel pipes or welded pipes processed from steel plates as specified in Article 6.2.
6.4 The types of welding rods, fluxes and welding wires used in the test shall match the materials of the test pieces. 7
Test content and methods
7.1 The test consists of two parts: basic knowledge test and operation skill test. 7.2 Welders should first take the basic knowledge test, and only after passing the basic knowledge test can they participate in the operation skill test. 7.3 The scope of the examination for basic knowledge of manual arc welding is as follows: a. Relevant knowledge of products and steel materials; b. Basic knowledge of electricians; c. Relevant knowledge of the melting welding process; d. Electric welding rods and their use; e. Contents of welding process; f. Performance of welding joints and their influencing factors; g. Causes and hazards of welding defects, prevention methods and repair; h. Welding stress and deformation; i. Welding inspection; '. Use and maintenance of welding machines; k. Joint types, weld symbols, and drawing identification: 1. Welding safety technology. 7.4 In addition to the provisions of Article 7.3, the scope of the examination for basic knowledge of buried arc welding should also include: a. Selection of welding specifications and their influence on weld formation; b. Working principle, structure and performance of welding machines; c. Selection of welding wire and flux.
SL35—92
7.5 The manual arc welding skill test is divided into butt welding of plate type I, II, III and pipe type IP, IⅡP, and IIP. 7.6 The various test subjects and work scope of manual arc welding welders are shown in Table 1. 7.7 The specific dimensions and groove types of the test pieces of each test subject of manual arc welding are shown in Figures 1 and 2. Except for the groove type of the horizontal welding position, which can be a single-sided V-shaped groove, the groove types of other welding positions are all V-shaped grooves. Each test piece is single-sided welding, and backing welding is not allowed.
（b）
Pipe wall thickness 5
70°±5°
Horizontal rotation flat welding
60°±5°
Figure 1 Various types of test pieces for plates
a) Test piece form A+ (b) Test piece form B
Horizontal, 45° fixed
（4 or B）
SL35—92
Various types of test pieces for pipes
Table 1 Various examination subjects and working scopes for manual welding welders Welding position or
Pipe (fixed) position||tt| |Horizontal rotation flat welding
Vertical fixation (horizontal welding)
or horizontal fixation (flat, vertical,
overhead welding)
45° fixation
Vertical fixation plus horizontal fixation
Test piece specifications mm
Thickness:
Outer diameter of pipe D
100~120
150~170
200300
Pipe wall thickness
Applicable working range
Parent material thickness 5<<20mm
Parent material thickness 5
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