Trench cover manufacturers, Hebei Airlines trench cover price of gold (certified), trench cover provided by Gold Wire Mesh Products Co., Ltd. Hebei Airlines. Hebei Airlines Gold Wire Mesh Products Co. (www.hbhangjin.com) is specialized in the "steel grating, steel mesh, wire mesh fence," the enterprise, the company adhering to the "honesty, hard service" concept, to provide you with the most quality products and services. Welcome to inquire! Contact: Michelle bow. Trench cover | Steel Grating | Galvanized Steel Grating test methods a test trench cover appearance. If the trench cover is hand-welded, it will generate a lot of welding slag, in order not to affect the appearance, may propose to clean up. If the trench cover is machine welded, good or bad edging is a major factor affecting the quality of products. Regularity of the weld, with or without open welding Weld, is the need to look carefully at the eyes. Second, the test trench cover size, diagonal. The national standard for the length and width of precision steel grating is 5mm. Each trench cover the length and width were reduced scale 5mm, easy to install. If every piece of steel grating Grand 5mm, it is estimated the site can not be installed, so the discovery of steel grating is normal within a short 5mm (consider installing factor), if you do not have a scale, you can advance that our company uses CNC welding accuracy can be controlled within 3mm. The diagonal measurement of the product, if the data is equal to the diagonal measurement error was less than 5mm, then the apparent size of basic products on the basic qualification. Third, the test trench cover the pitch and flat steel thickness, trench cover the pitch affects the trench cover the cost of carrying capacity and cost, we GB logo is generally flat in the center of the pitch, the correct measurement method is From a flat in the center to center distance of the other flat steel trench cover manufacturers, if someone tells you it should be the distance from the flat edge to the other edge of the root flat, that is wrong. The thickness of the largest flat steel flat steel thickness national standards may be error + -0.25mm, generally thick HDG will increase the thickness of the ah, so you have to use calipers card data does not exceed 0.25mm product is qualified. Gold Wire Mesh Products Co., Ltd. Hebei Airlines in a "people-oriented, quality for survival," the purpose, strictly control the quality of products, customers are welcome to visit our company, expand make. Trench cover how to choose the trench cover material is used according to certain spacing and flat steel rails twisted steel, square steel, round steel, flat steel, etc. staggered, and welded into the middle of a steel with a square lattice products. By slitting flat is flat, and there are steel clipping together. Flat steel material is generally yes yes Q235 trench cover material, 304: corrosion resistance in general, the most commonly recommended. 316 (316L): corrosion-resistant ability, more expensive. 301: corrosion resistance is weak, the price is cheaper. Flat common models 253 255 303 305,323,325,403,404 405, etc.,. Flat shape into: flat tooth with I-flat. Toothed steel: the same model and ordinary flat trench cover transportation, except that one side has a rugged flat teeth marks. Mainly due to slip. I type steel: flat sides thick thin in the middle. Twisted steel: Also called twisted square steel. Generally 5x5 6x6 8x8 square steel, twisted steel. Common specifications 20 * 5,25 * 5,25 * 3,32 * 5,32 * 5,40 * 5,40 * 3,50 * 5,65 * 5,75 * 6,100 * 8,100 * 10 AOpen factory outlets, etc. Because so many of the specifications. Air quality in Hebei Wire Mesh Products Co. Gold over by reasonable price and high quality service to win customers praise! And eager to support each other with various user units, mutually beneficial, long-term friendly cooperation!