Raw materials and finished steel works site acceptance
Time：[2014-12-13] Hits：6267
Raw materials and finished steel works site acceptance
I. General Provisions
1. This chapter applies to the main material into the steel structure of each sub-project implementation site, zero (the Department) parts, finished parts, standard parts and other products, site acceptance.
2. site acceptance inspection lot shall be consistent with the principles of the sub-projects inspection lot, inspection lot can also be divided according to the project size and feed the actual situation.
Second, the steel timber
1. steel, steel castings varieties, specifications, performance and other products should be consistent with existing national standards and design requirements. Quality of imported steel products should meet the design standards and contract requirements.
2. One of the following conditions are steel, should carry out random retest, retest results of its products to be consistent with existing national standards and design requirements.
(1) foreign steel imports;
(2) mixed batch of steel;
(3) thickness equal to or greater than 40mm, and is designed with the performance requirements of the slab Z;
(4) level of security for a building structure, large-span steel structure, the main force of the steel components used;
(5) design of steel re-inspection requirements;
(6) any doubt on the quality of steel.
3. The thickness of the plate and tolerance should be consistent with their product standards.
4. beam specifications dimensions and tolerances shall comply with the requirements of the standard of their products. Each species, sampling five steel specifications.
5. In addition to the steel surface appearance quality should be consistent with the relevant provisions of the standard country now, there should meet the following requirements:
(1) When the steel surface rust, pitting or scratches and other defects, the depth of not more than 1/2 the thickness of steel allow negative deviation values;
(2) Rust grades of steel surfaces shall comply with existing national standards, "the steel surface before painting Rust grades and preparation grades" GB8923 provisions of C-Class and C-level and above;
(3) steel side edges or delamination fracture should not have, slag and other defects.
Third, welding materials
1. variety of welding materials, specifications, performance and other products should be consistent with existing national standards and design requirements.
2. Important steel welding materials used should carry out random retest, retest results should be consistent with existing national product standards and design requirements.
3. ceramic ring stud welding and welding specifications, dimensions and tolerances should be consistent with existing national standards, "welding cylinder head nails" GB10433 the regulations. Random 1% by volume, and should not be less than 10 sets.
4. There should be no appearance of drug skin electrodes off, welding core rust and other defects; flux should not be exposed to moisture caking. Random 1% by volume, and should not be less than 10 pack.
Fourth, the connection with the tightening of standard parts
1. High strength steel connecting large hexagon head bolts connecting deputy, torsional shear bolts connecting deputy, steel truss with high strength bolts, bolts, rivets, self-tapping screw, rivet, nail, anchor (mechanical type and chemical reagent type), anchors and other standard parts and fastening nuts, washers and other standard accessories, the species, size, and performance should be consistent with existing national product standards and design requirements. High strength large hexagon head bolts connecting deputy and torsional shear strength bolts connecting deputy factory inspection report should have tightening torque coefficient and axial force (pre-tension), respectively, with the box.
2. High-strength hexagon head bolts connecting deputy according to this specification in Appendix B of torque coefficient test.
3. torsional shear bolts connecting deputy shall be specified in Appendix B of this specification testing pre-tension.
The bolts connecting deputy, shall boxes matching supply, should be marked batch number, specifications, quantity and production date on the carton. Bolts, nuts, washers protect the appearance of the surface should be oiled, there should not be contaminated with rust and booties, thread should not damage. According to the number of random packing 5%, and not less than 3 boxes.
5. building structural safety grade level, span 40m and above bolt ball node steel truss structure, high strength bolts connecting the surface hardness test should be carried out on the strength bolts 8.8 hardness should be HRC21-29; 10.9 high strength bolts shall hardness HRC32-36, and should not have cracks or damage. 8 checks according to specifications.
Fifth, the solder balls
1. solder ball and solder balls used in the manufacture of raw materials, and its varieties, specifications, performance should be consistent with existing national product standards and design requirements.
2. solder ball welds should be non-destructive testing, the quality should meet the design requirements, when the design requires no secondary quality standards should be consistent with the provisions of this specification. Specifications for each 5% by number of checks, and should not be less than three.
3. solder ball diameter, roundness, wall thinning amount of size and tolerances shall comply with the provisions of this specification. Specifications for each 5% by number of checks, and should not be less than three.
4. solder ball surface should be no significant ripple and no more than partial uneven 1.5mm. Each specifications according to the number of checks of 5%, and should not be less than three.
Six bolt ball
1. Bolt ball and manufacture bolt ball node raw materials used, the species, size, and performance should be consistent with existing national product logo and design requirements.
2. Bolt the ball but not burning, cracks and folds. Random 5% each specification, and should not be less than five.
3. The ball screw bolt size should comply with existing national standards, "the common thread of basic dimensions" GB196 in coarse thread, the thread tolerances must comply with the current national standard "common thread tolerance and cooperation" GB197 stipulated 6H clear degree level. Random 5% each specification, and should not be less than five.
4. Bolt ball diameter, roundness, two bolt holes adjacent to the angle between the centerline dimensions and tolerances shall comply with the provisions of this specification. Random 5% each specification, and should not be less than three.
Seven, seal plate, cone and sleeve
1. The closure plate, cone and sleeve and manufacturing sealing plate, cone and sleeve raw materials used, the species, size, performance, etc. should be consistent with existing national product standards and design requirements.
2. The seal plate, cone, sleeve dress may not have cracks, burnt and oxide. Random 5% each specification, and should not be less than 10.
Eight, metal pressure plate
1. The metal pressure plate and pressure plate manufacturing metal raw materials used, the species, size, and performance should be consistent with existing national product standards and design requirements.
2. Pressed metal pan of water boards, variety, size and performance package gussets and parts of waterproof sealing material should be consistent with existing national product standards and design requirements.
3. Pressed metal plate size specifications and tolerances, surface quality, coating quality and shall comply with the design requirements of this specification. Random 5% each specification, and should not be less than three.
Nine, coating materials
1. steel corrosion coatings, thinners and curing agents variety of materials, specifications, performance and other products in line with existing national standards and design requirements.
2. The anti-corrosion coatings and fire retardant coating type, name, color, and shall be valid proof of its consistent quality documents. When turned on, there should be no crust, agglomeration, gels and other phenomena. Random 5% each specification, and should not be less than three barrels.
X. Other
1. Steel with rubber pad varieties, specifications, performance should be consistent with existing national product standards and design requirements.
2. Steel Engineering are involved in other special materials, its varieties, specifications, performance should be consistent with existing national product standards and design requirements.
