GB 02s404 bid s312 non-standard stainless steel flexible waterproof casing rigid waterproof casing iso ..

Stainless steel rigid waterproof casing (B type) Note: 1, through the wall of the casing as when case of non-concrete walls, concrete walls should be replaced, its casting range should fly wing to wing ring diameter (D4) Large 200, and must be a casing Pouring solid in the wall, packing sleeve should tightly tamping. 2, wearing a tube wall thickness of the concrete should not be less than 200, or one or both should make the walls thicker. At least the diameter of the thickened portion D3 + 200. 3, welding structure dimensional and geometric tolerances accordance with JB / T5000.3-1998. Using manual arc welding, electrodes Model E4303, grades J422. Weld groove basic form and size to perform in accordance with GB985-88. 4, when the sleeve (item 1) The roll-formed, perimeter allowable deviation is: D2≤600, ± 2, D3> 600, ± 0.0035D2. 5, the weight of the casing to L = 200 calculations, when L> 200, should be calculated. 6, when the pool for drinking water installation, should contact side in asbestos cement filling them with water, non-toxic sealant, the procedures outlined in this website rigid waterproof casing A type installation Figure II