盾构机吊装方案范文.doc

肃清流毒影响获得了辉煌的成就，通过参观学初心，不断的提高自我素质Ellipticity of elbow pipes with diameters less than or equal to 15or less shall not be greater than 6%. Wall thickness of the pipe wall thinning rate must not exceed the original 15%. Crease roughness: diameter 125 mm or less, shall not exceed 3 mm diameter less than or equal to 200 mm, not more than 4 mm. simmering bending production of square steel tube extension, to use the whole tube bending. Interface if necessary, the welding position should be located in the middle of the vertical arm. install expansion joints should be done. If design is not required, pipe compensator lengthen should conform to the requirements in the following table: square scale length δ x is equal to 1/2. Pre stretch tolerance: casing + 5 mm, +10 mm. pipe form, location, spacing shall meet the design and specifications. piping on back or return pipe at higher levels of the upper to automatic valve to install a drain valve below the horizontal parts. supports and hangers of checks and the number 1) hanger installed must be checked before installation of supports and hangers part models, specifications of springs setting values, whether the materials meet the requirements of drawings and documents; 2) supports and hangers of material, size and accuracy shall conform to the provisions of the design drawings, material technical requirements should be consistent with national standards, industry standards and technical requirements related to the alloy spectrum review should be carried out; 3) pipe supports and hangers part plant product quality certificate for each variable spring supports, constant support hangers, dampers, damper function, there should be factory calibrated test
第 13 页
肃清流毒影响获得了辉煌的成就，通过参观学初心，不断的提高自我素质Ellipticity of elbow pipes with diameters less than or equal to 150 mm must be not greater than 8% diameter of 200 mm or less shall not be greater than 6%. W