1. The main characteristic of seamless square pipe is that it has no welding seam and can accept high pressure. Products can be very rough as-cast or cold-dial parts.
2. Fine square tube is a product presented in recent years, mainly with strict tolerance and roughness of inner hole and outer wall dimensions.
Scope of Electrical Square Pipe Operation Specification
1. Scope of Electrical Square Pipe Operation Specification
This technical specification is applicable to square pipe laying in lighting and power distribution, as well as square pipe laying in ceiling and wall panel.
2. Construction preparation of electrical square pipe operation specification
2.1 Data requests:
2.1.1 Galvanized square pipe (or wire pipe) has average wall thickness and average weld seam, without splitting, sand hole, prism and concave flat phenomenon. In addition to galvanized pipes, other pipes should be PRE-RUSTED and brushed with anticorrosive paint (when embedded in cast-in-situ concrete, no anticorrosive paint should be brushed, but rust should be removed). The surface of galvanized pipes or square pipes brushed with anticorrosive paint is in good condition, there is no spalling phenomenon, and the product material sheet and qualification certificate should be provided.
2.1.2 Tube hoops use threaded hoops. Silk and clear without screwing, galvanized layer in good condition without peeling, splitting, lubrication at both ends without burrs, and product certificate.
2.1.3 Locking nuts (root nuts) are intact in shape, with clear threads and product certificates.
2.1.4 There is a difference between thin and thick pipes. The guard should be intact and have a product certificate.
2.1.5 The thickness of metal plate should be less than 1.2mm for iron lamp head box, switch box, junction box, etc. The galvanized layer should not be peeled off, there is no distortion to open welding, the knock hole is intact, the panel device hole and the ground wire welding foot are complete, and the product qualification certificate is obtained.
2.1.6 The specifications, height and width of panels and cover plates, and the distance between device holes should be matched with the boxes used. The shape of the panels is intact, the color of the panels is evenly different, and the product certificates are available.
2.1.7 Round steel, flat steel, angle steel and other materials should meet the requirements of relevant national standards. The galvanized layer is intact and has product certificate.
2.1.8 Bolts, screws, expansion bolts, nuts, washers, etc. shall be galvanized.
2.1.9 Other data (such as lead wire, welding rod, rust-proof paint, cement, oil, etc.) are not obsolete.