T/JSAS 035-2022 1100kV and below spiral steel tube busbar shell

Scope

Scope: This document specifies the technical requirements, inspection methods, inspection rules, marking, packaging, transportation, and storage for 1100kV and lower spiral welded pipe busbar shells. This document applies to 1100kV and lower spiral welded pipe busbar shells. Main technical content: 2. Aluminum alloy spiral welded pipes: - The length of the pipes shall be processed and inspected according to the drawings and relevant technical documents. See Table 2. - The maximum deviation of the pipe length from the basic dimension L (m) shall meet the requirements as specified in Table 2. - L < 1.0: ¬Ī1mm; - 1.0‚ȧL‚ȧ4.0: ¬Ī2mm; - 4.0‚ȧL‚ȧ7.0: ¬Ī3mm; - 7.0‚ȧL‚ȧ10.0: ¬Ī4mm; - 10.0‚ȧL‚ȧ15.0: ¬Ī5mm; - 15.0‚ȧL‚ȧ18.0: ¬Ī6mm. - The wall thickness of the aluminum alloy spiral welded pipes shall comply with the requirements specified in Table 3. It shall be measured using an outside diameter micrometer, a vernier caliper, or other non-destructive testing devices with corresponding accuracy. In the event of disputes or arbitration regarding the measured results of the nominal thickness, the results measured by the micrometer shall prevail. - Table 3: Permissible deviations of the pipe wall thickness. - Wall thickness (mm): - Permissible deviation (mm): - 5 ¬Ī 0.3 - 6 ¬Ī 0.4 - 7 ¬Ī 0.5 - 8 ¬Ī 0.6 - 9 ¬Ī 0.7 - 10 ¬Ī 0.8 - 11 ¬Ī 0.9 - 12 ¬Ī 1.0 - 13 ¬Ī 1.1 - 14 ¬Ī 1.2 - 15 ¬Ī 1.3 - 16 ¬Ī 1.4 - 17 ¬Ī 1.5 - 18 ¬Ī 1.6 - The welded joints shall meet the following requirements: - 4.4.1 The internal welded joints of the pipes shall not have sharp corners or burrs. They shall be polished for a smooth transition, with a maximum roughness Ra of 3.2őľm. There shall be no cracks, non-fusion, gas holes, welding bumps, undercuts, or other welding defects. Welding slag and spatter shall be completely removed. Th

Development Information

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