Hainan Steel teach you: connection handling, processing and Steel Works friction surface member

The relevant provisions of 1, the connector bolt holes in Chapter 8 of this specification shall be processed, precision bolt hole wall surface roughness, pore size and pitch tolerances, etc., should be consistent with existing national standards for construction quality "Steel Works acceptance "of the relevant provisions of GB50205.
2, bolt hole pitch over the provisions of this Code section 7.2.1 of the allowable deviation, the base material can be used to match the welding electrodes, and shall be subject to the system after re-qualified NDT holes, each hole by welding Number of re-drilling must not exceed 20% of the group the number of bolts.
3, high strength bolts frictional contact surface of the face due to the thickness of the gap tolerances, manufacturing tolerances or misalignment, etc. was specified for processing in accordance with Table 7.2.3.
4, high strength bolt connection friction surface treatment process can be selected according to the design requirements of the anti-slip coefficient, anti-slip coefficient should meet the design requirements. When using hand-grinding wheel, grinding direction should be perpendicular to the direction of the force, and the range of not less than four times the grinding bolt aperture.
5, the high strength bolts connecting the rear surface of the friction surface treatment, should meet the following requirements:
(1) connected friction surfaces should be kept dry and clean, there should be no flash, burrs, weld spatter, burr, iron skin, dirt and so on;
(2) the treated friction surface should take protective measures, shall be marked in the friction surface;
(3) friction surface with rust treatment, before installation should be fine wire brush perpendicular to the direction of the force member friction surface to remove rust. Hainan Steel