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Fastener Structure Installation
Jun 15, 2017

Mainly applicable to the installation of steel in the ordinary bolts, torsional shear high-strength bolts, large hexagon head high-strength bolts, rivets, self-tapping nails, Fastener pull rivets, nails, anchor, anchor bolts and other fastening standard parts installed Construction methods and quality standards;

 Installation of the construction before the construction of major equipment, equipment ready; all parts, components prefabricated assembly inspection before installation of the construction site, Fastener the discharge material site ready, with the construction conditions;

★ All the construction workers have participated in the construction technology to the end, clear the construction procedures, construction methods, installation procedures, Fastener quality standards, product protection and HSE technical requirements;

★ construction squad leader, Kong Gang should deal with construction drawings, standard Atlas, construction and acceptance standards and other well-known;

★ arrival of the variety, specifications, Fastener performance, etc. should be consistent with the existing national product standards and design requirements, product quality documents. High-strength large hexagon head bolts and vice-torsional shear high-strength bolts connected to the factory should be with the box with a torque coefficient and fastening force (pre-tension) inspection report;

A) High-strength bolted connection shall be supplied in the form of packing box, and the batch number, specification, quantity and date of manufacture shall be indicated on the packing box. Bolts, nuts, washers appearance of the surface should be oil protection, should not appear rust and contaminated stolen goods, the thread should not be damaged;

B) ordinary bolts as a permanent connection bolts, when the design requirements or the quality of its doubt, the bolt should be the minimum tensile load test, Fastener each type of bolt checks 8;

C) The high-strength large hexagon head bolts should be re-tested with the torque coefficient and issued a test report. Each batch of eight sets of connecting pairs were taken for re-inspection. After re-inspection, the average of the 8 sets of connecting sub-torque coefficients 0.110 to 0.150, Fastener the standard deviation is less than or equal to 0.010;

D) Torsional shear high-strength bolted joints should be pre-tension re-inspection and issued a test report, each batch of eight sets of auxiliary vice, Fastener the pre-tension average and standard deviation should meet the following requirements:

E) The steel ball grid structure of the bolted ball joint with the safety grade of the building structure and the span of 40m and above shall be tested for surface hardness by connecting the high strength bolts and 8 in accordance with the specifications. The hardness of 8.8 high strength bolts should be HRC21-29; 10.9 grade high strength bolts should be HRC32-36 hardness, and shall not have cracks or damage.

F) high-strength bolt connection in the transport, storage process, must be light, light unloading, shall not damage the thread;

G) high-strength bolts should be connected according to the batch number on the box, the classification of custody, the use of any prohibited before the box, Fastener to prevent contamination of stolen goods;

H) high-strength bolts according to the number required to receive the day, the Treasury should be registered with the people, Fastener the use of specifications, the number of requisition, the use of parts, the remaining bolt to keep safe, not litter,

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