Technical Requirements for Assembly of Steel Pipe Components Steel tube assembly should be made of special molds, assembled parts as much as possible with the versatility and interchangeability. On the volume of small or complex structure does not have Interchange conditions of the components, the production of good marks left to record for transportation, installation and other damage to the process of re-processing used. The inclination of the flange facing the main axis, the allowable deviation of the displacement of the connecting plate and the allowable deviation of the displacement of the connecting plate shall meet the requirements. Technical requirements for welding of steel rods Steel pipe welding in addition to meet the design drawings and DL / T 646 transmission line steel pipe manufacturing technology requirements, should also meet the following requirements: A) Where automatic submerged arc welding, such as steel pipe longitudinal welds, butt welds, should use automatic submerged arc welding, other welds preferred carbon dioxide gas shielded welding; B) the welding process used in the welding of the chemical composition and mechanical properties must comply with the relevant standards. Welding rod varieties, grades must be welded with the chemical composition of steel and mechanical properties equivalent, and has a good welding process performance; C) Hand-welded weld slag must be knocked clean; D) The welds connected with the steel pipe and the flange shall be welded according to the design requirements, the second grade weld standard shall be required for appearance, and the vertical welds of the ribs and steel pipes shall be welded according to the design requirements; E) The inspection of butt welds shall be carried out in accordance with DL / T 646 Technical Requirements for Steel Pipe Pole of Transmission Lines; F) The longitudinal welds of two adjacent steel pipes should be staggered by 180 degrees; G) The outer dimension of the weld, the internal defect of the welded joint, the local inspection, the quality classification of the steel pipe welding seam, and the effective thickness of the weld of the steel pipe shall meet the technical requirements of DL / T 646 transmission line steel pipe. Test assembly A) steel rod test assembly should be used vertical or horizontal assembly, the preferred vertical assembly. Such as the use of sub-assembly, assembly must ensure that the continuity of the tower test; B) The number of bolts to be connected to each node shall not be less than 75% of the total number of bolts. , And not less than 3; C) vertical assembly process should be measured in the center of the vertical line deviation, the deviation should not be greater than 0.08% H (H: test assembly height); D) test assembly should check the various parts of the connection and to meet the construction plans and DL / T646 transmission line steel pipe manufacturing technology requirements. Galvanized technical requirements A) galvanized technical requirements in the coherent connection points need to open galvanized hole, you can open the main pipe in the galvanized hole, But the location of openings and the size of openings must be agreed with the design unit; B) the amount of hot dip galvanized components and zinc layer uniformity, adhesion, should be consistent with GB2694-2003 Provisions on Technical Conditions for the Manufacture of Transmission Line Towers; C) The thickness, coating appearance and bonding properties of the components shall be in accordance with GB / T 9793, Metallic and other inorganic coatings, thermal spraying of zinc, aluminum and their alloys.

Traffic Signal Lighting classification and function Traffic lights traffic signals an important part, is the basic language of road traffic. Traffic lights from red (to indicate that traffic), green (represented allows passage), yellow (TableShown warning) components. Divided into: motor vehicle lights, non-motor vehicle lights, crosswalk lights, lane lights, directional lights, flashing warning lights, road and railway level crossing lights. Traffic lights from red (to indicate that traffic), green (represented allows passage), yellow (warning indicates) components. Divided into: motor vehicle lights, non-motor vehicle lights, crosswalk lights, lane lights, directional lights, flashing warning lights, road and railway level crossing lights. Widely used in highway intersections, corners, bridges, there are security risks of dangerous sections, directing the driver or pedestrian traffic, and promote the smooth flow of traffic and avoid traffic accidents and accidents. Color lights The first time only the red and green colors, and later improved after the increase of a yellow light, red light means stop, yellow indicates ready, a green light indicates traffic. The reason why the use of these three colors, one is the three primary colors, other colors are also out on the basis of increase, on the other hand, with these three colors as traffic signals and also people's visual structure and psychological reaction. Classification Green signal green signal is allowed to pass the signal. Press the "Traffic Safety Law Implementation Regulations" states: green light When light to allow vehicles and pedestrians, but the vehicles are not allowed to interfere with the turning was released straight road Vehicles and pedestrians. Red signal Red signal is absolutely closed to traffic signals. When the red light to vehicular traffic. Without prejudice to the right turn of the vehicle to be released in the case of vehicles and pedestrians can pass. Forbidding signal is a red signal with forced sense, the case of this signal, banned in moving vehicles shall be parked outside of the stop line, pedestrian proscribed lines in the sidewalk waiting to be released; when the vehicle waiting for release, are not allowed to turn off , allowed the car door, all kinds of vehicle driver allowed to leave the vehicle; bicycle carts are not allowed to turn left from the junction outside the bypass, turn right straight allowed to use bypass methods. Yellow signal Yellow light, the vehicle has crossed the stop line can continue to pass. Meaning of yellow signal between the green signal and the red signal, both not to pass side, there are allowed to pass side. Yellow light, warning drivers and pedestrians over time, will soon be converted to a red light, you should stop your car at the back of the line, do not enter the pedestrian crosswalk. But too close to the vehicle as a result of the inconvenience and parking across the stop line, you can remain in use. Pedestrians in the crosswalk has been depending on the case to the car, or as soon as possible by, or standing still, or returned to the original place. Flashing warning lights Persistent blinking yellow light, indicating the vehicle, pay attention to pedestrians when Outlook, confirm safe passage. This lamp does not control the traffic ahead and make the role of the line, some suspended above the intersection, and some traffic lights in the night after the cessation of the use of only one of the yellow plus flash to alert vehicles, pedestrians in front of the intersection, be careful driving, watching carefully, safe passage. Flashing warning lights flashing at intersections, vehicles, pedestrians when, that is, to comply with the principle of ensuring safety, but should not have to comply with traffic signals or traffic signs traffic intersection control provisions. Directional lights Direction command signal is a dedicated vehicle traveling direction indicating lights, through different arrows pointing to indicate the vehicle straight, turn left or right. It consists of red, yellow, green arrow pattern composition. Traffic signal baton Traffic police issued a stop signal rod holding, closed to vehicular traffic. Vehicle has crossed the stop line can pass; when the traffic police issued a straight signals, to allow the vehicle straight and turn right in the vehicle was released without prejudice to vehicle traffic can pass under; when the traffic police issued a left turn signal, left turn vehicle and permit straight passage of the vehicle, the vehicle turn right parties and T-junction to the right of straight bars indicate no vehicle was released without prejudice to the case of vehicle traffic can pass. Driveway lights Lane light by the green arrow lights and red lights fork and set in the variable lane, lane only for the work. When the green arrow lights, Pets direction indicated by the vehicle lane traffic; when the red arrow shaped light or lights, prohibit vehicular traffic lane. Crosswalk signal lights Crosswalk lights from red, green and white lights composition. Red mirror on a stand-up guy image, in the face of a green walking man image. Crosswalk lights located in the pedestrian flow of the intersection crosswalk important ends. Lamp for roadways, and vertical center of the road.