Shaanxi Weinan 70/75 PRESTRESS metal bellows / galvanized metal pipe scale light [online] Hengshui Rubber Co., Ltd. specializes in producing light engineering prestressed metal bellows, such as small-caliber φ35φ40φ45, as φ300φ350φ300φ400 large diameter can be produced. Option 1 Raw Materials: The most commonly used prestressed metal bellows the main raw material for the black steel and galvanized steel in two. Annealing the material is Q195 steel, a major supplier of Shanghai, Tianjin, specifications for 36 * 0.23-0.28. The most commonly used because of the thickness of a thickness of 0.25-0.27 can guarantee the normal construction requirements while maintaining the low-cost manufacturers, and suppliers of raw materials, daily stocking also within this range. Strip the thinner, lower cost, ring stiffness decreases. The pipe diameter of 60 or less of the available 0.24-0.25, 0.23 and below is not recommended, stiffness is too low. 60 or more pipe diameter, material thickness must be greater than or equal to 0.25. Shanghai strip thickness, annealing uniformity, low stiffness, a slightly higher price. Tianjin is relatively uneven strip thickness, stiffness, relatively low prices. If the galvanized pipe, remember we must exhort factory hot dip galvanized steel production. Because although cold galvanized steel cheaper, but the results are worse than the black anti-rust steel, rusty water once, will be a great loss of engineering supervision see image, repentant ah. HDG cost is 1.2 times the black strip. If the black strip on pipe diameter according to choose the relative thickness and then talk about the price and manufacturers like how to choose a good quality of a bellows it? No matter what the thickness of the material, due to the different equipment, different pitch, high waves are not the same, the quality is not the same. To choose a good pipe manufacturer should choose a good look at whether the producer of more than 2 years of skilled workers, as this live is a technology live, not even the best raw materials are controlled journeyman poor quality bellows. Second, look at the manufacturers performance, strength. There is not enough control on the quality of performance is certainly not proven, supply capacity is also questionable. No multiple devices, can not provide a variety of options. Optical Engineering Hengshui Rubber Co., Ltd., is not afraid of confinement, afraid not know what. Done Railway First State Road 110 reconstruction project, Beijing Urban Construction Engineering Ring Bridge Shijiazhuang, Beijing-Shanghai high-speed Beijing-Hong Kong and Macao expansion project, the Beijing-Shanghai high-speed, big speed and many other large-scale projects, the higher cost worth recommending ~ I In line with the objectives of the period of construction demand in more than 100,000 m project to take home processing methods, so that all tenders to the proper implementation of construction, service attitude and production quality have received praise each section! And so on; do the most preferential price. Heng Optical Engineering Rubber welcome you to purchase!