S9074-AQ-GIB-010/248 Rev 1
Table 7-5. Essential Elements of a Welding Procedure 12/ - Continued
NOTES (continued):
3/ For all automatic, mechanized, and robotic welding, any machine setting, when used alone to control the process parameters, shall be specified in the procedure and, for pipe welding, the settings for each pipe size to be welded in production shall be required. For robotic welding, the following shall also apply: (a) A robotic welding equipment specification describing each part of the robotic welding cell and its function shall be included in the welding procedure. The robotic welding equipment specification shall include the robot, robotic controller (including software version), welding power source, wire feeder, torch type and neck angles, welding leads and cable bundle lengths, fixturing and tooling, positioners (including coordinated motion where applicable), filler wire form (e.g., spool or drum), and vision system, if applicable. Equipment manufacturer and model number shall also be included in the procedure. (b) A description of the robotic welding program selection and execution protocol shall be included in the procedure. (c) Any controls used to adjust or monitor the welding process in real-time (e.g., joint finding and adaptive controls), either automatically or through operator intervention, shall be specified in the procedure along with a description of its use in the welding process. (d) For automatic robotic welding, a list of each joint type to be welded in production (see 4-5.4). The certified first article test record (see 4-6.1.2) for each joint type shall also be referenced in the welding procedure. 4/ For plasma arc process and gas tungsten arc process. 5/ See base material restriction in table 7-7, footnote 2. The welding procedure shall specify this restriction for each specific material affected. For fillet welding over primer, the primer manufacturer, manufacturer’s designation, and maximum thickness. 6/ Heat input requirements shall be specified for base materials with toughness requirements. Combination limits of amperage, voltage, and travel speed shall be specified for the ranges of each parameter (see 4-4.1.13.2). Equivalent means of limiting heat input (for example, nomographs or, for shielded metal arc, bead length methods) are permissible. Simple reference to a formula is unacceptable. Requirements for heat input shall comply with the applicable fabrication document in all cases. 7/ For S-51, S-52, S-53, and S-53A materials, details of how joints, including weld repair excavations, are prepared; this includes permissible means of base metal cutting, machining, and grinding; description of machining and grinding tool bits; and interpass cleaning techniques and equipment. 8/ Where qualification is by autogenous or single pass welding, these conditions shall be specified as applicable. 9/ Weaving or stringer bead deposition shall be an essential element, and if weaving is permitted where toughness testing is required by table 7-7, footnote 2, maximum bead width shall also be an essential element. 10/ It is the activity's responsibility to ensure the extent of the operating ranges do not alter the transfer mode that is qualified. 11/ For waveform controlled welding, specify the welding power supply manufacturer, manufacturer's model number, and program identification (see 4-8.r). 12/ For joints where temperature control away from the joint is required, heat input range, interpass temperature, electrode size, amperage, voltage (except SMAW), bead length (if used), and minimum distance of the weld from the temperature control point shall be specifically identified for each thickness and position of base material to be welded. Requirements for monitoring temperature at the area to be protected and the maximum temperature shall also be specified. 13/ For welding on TCA (see 3-2.18) members, the essential elements specified by D-1.4.1 shall apply for all procedures.
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