Regarding the weld leg height of Type D connectors
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Dear experts, I have a question. According to clause 7.3.2 of GB150.4, when the drawings state that \"the type and dimensions of the joints shall comply with those specified in HG/T20583-2001\", the weld leg height for Class D joints should be determined in accordance with HG/T20583； When it is not specified, should the weld leg height for Class D joints be based on the thickness of the thinner plate? Is that the correct understanding?
The welding details are usually provided in accordance with the structure specified in HG/T20583. The height of the weld legs follows the requirements given in the drawings; if no specific values are provided, then the thickness of the thinner plate is used as a reference
I usually write: according to the thickness of the thinner plate, and not less than 6 mm.
Your understanding is correct. For all those in our drawings where the height of the weld leg is not specified, we note that: the height of the fillet weld root shall be based on the thickness of the thinner plate.
If it isn’t written, it should be understood according to the established methods.
It shall be based on the thickness of the thinner plate, with a minimum of 6 mm.
Aren’t the detailed weld height requirements specified on Figure 150? I think what needs to be clarified is what exactly the weld height refers to – is it the vertical height of the weld seam (K value)? It is still the height perpendicular to the bevel of the weld
Thank you to all experts for their answers. As for my understanding of Appendix D regarding grooves with a length of 150 mm, this appendix is placed after the section on design in GB150.3; therefore, it can only be used by designers as a reference for groove design. The groove root depth specified in this appendix can serve only as a basis for designers to follow. Process engineers, on the other hand, are not allowed to directly use the root depth values given in Appendix D when carrying out processing tasks, unless the drawings specify that the groove parameters in Appendix D should be used. As process engineers, they must determine the root depth in accordance with the requirements of 7.3.2 in the manufacturing section of GB150.4. However, some people believe that process engineers can directly use the groove dimensions provided in Appendix D. What are your thoughts on this? I would appreciate some guidance.
The root thickness of the fillet weld shall be based on the thickness of the thinner plate, and shall not be less than 6 mm.