jai_landrover
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CDs exceeds minimum spec however you have bs1387
3.1. The minimum material specification for all tubing will be nominal 38mm / 1½" bore steel "blue band" tubing to BS 1387. (This will actually be nearer 42mm / 15/8") This has a minimum wall thickness of 3.2mm / 1/8" and a minimum outside diameter of 48.3mm / 17/8". See table below for practical imperial and metric stock sizes. Tensile strength will be between 320 - 416 N/mm2. Yield strength will be at least 195N/mm2. Tubing which exceeds this specification is recommended where the outside diameter at least matches the above type and a minimum nominal wall thickness of 2.5mm where the quality and origin can be traced.”
3.1. The minimum material specification for all tubing will be nominal 38mm / 1½" bore steel "blue band" tubing to BS 1387. (This will actually be nearer 42mm / 15/8") This has a minimum wall thickness of 3.2mm / 1/8" and a minimum outside diameter of 48.3mm / 17/8". See table below for practical imperial and metric stock sizes. Tensile strength will be between 320 - 416 N/mm2. Yield strength will be at least 195N/mm2. Tubing which exceeds this specification is recommended where the outside diameter at least matches the above type and a minimum nominal wall thickness of 2.5mm where the quality and origin can be traced.”