Scope of Tunnel Protection Doors: This standard specifies the explosion-proof level, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage of tunnel protection doors. It is the technical basis for the design, manufacturing, and acceptance of tunnel protection doors. This standard is mainly applicable to steel explosion-proof doors used in special public and civil buildings

The function of tunnel protective doors is to resist the air pressure brought by trains traveling in the tunnel, keep the internal equipment intact, and prevent damage from air pressure shock waves. Door panel thickness: 3.0mm carbon steel plate; Door frame thickness: 50mm * 120mm * 5.0mm channel steel; Door leaf thickness: 76mm (7.6cm); Lock: Handwheel lock; Surface treatment: Zinc rich primer metal fluorocarbon paint; Filling material: rock wool or perlite; Application locations: Railway tunnels, cross passages, repeater stations, substations

Packaging, marking, transportation, and storage of tunnel protective doors: Packaging: The outer packaging of the product should ensure that the surface of the product is not scratched, and it is firm, reliable, and convenient for transportation; Logo: After packaging each batch of products, the user name, specifications, model, etc. of the batch of products should be indicated; The position for pasting the trademark is at the edge of the door frame in the opposite direction of the opening direction of the fan; Transportation: During the transportation process, corresponding measures should be taken to prevent deformation and damage to the product; Storage: The product should be stored in a well ventilated, dry, rainproof, and corrosion-resistant place; The product should be placed upright at an angle of no less than 70 °, and a wooden block with a height of no less than 30mm should be placed at the bottom;