Welding Drawing Standards. A reference line 3. Why wait for paper.
Drawing conventions which applied to BS 308-123 in general also apply to the European Standards referenced in BS 8888. It is recommended that contract de-sign drawings show complete joint penetration or partial. The reference line arrow also contains additional details about the welding itself.
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This placement is important. The British Standard for weld symbols is BS EN 22553. ENGINEERING DRAWING STANDARDS MANUAL 3 1. It shows on technical drawings how and where welds are to be made including information such as geometry manufacture quality and testing of the welds.