[Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - a pipeline project] material requirements, types of sheet metal, pipes and other documents should be quality (including factory certification, quality certification and test reports, etc.) and product list. 2, the finished product does not allow duct deformation, distortion, cracking, holes, flanges off, open welding, riveting drain, drain bolt holes and other defects play. 3, the valve muffler installed, cover, air conditioning apparatus and other components should be checked whether the flexible, muffler piece, paint layer without injury. 4, the material used in the installation: bolts, nuts, washers, gaskets, seals, self-tapping screws, pop rivets, welding, all kinds of canvas, woven, nail, bolt, etc. should conform to product quality requirements. [Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - Pipeline Project] can not make flanged duct shall meet the following requirements: 1) no flange connection interface and connection duct should meet the following seven , as specified in Table 8 round duct core tube connection should meet the requirements of Table 9; 2) sheet steel rectangular duct flange interface and accessories engineering specifications, the size should be accurate, the shape should be the rule, the interface should be tight; thin steel flange hem (or flange section) should be straight, bending should not exceed 5/1000; elastic or spring clips cuttings should match the sheet steel flange; corner pieces with thin steel pipe flange corners interface should be firmly fixed, close, face should be smooth, there should not be connected at the continuous penetration of more than 2mm gap seam. 3) C, S-shaped cutting rectangular duct connecting tube side length should not exceed 630mm; cuttings and in charge of processing the socket should match the width of consistent project, which allows deviation of 2mm; the connection should be smooth, tight project quotation, Cuttings should not be less than the length of the ends overwhelming 20mm 4) by vertical seams, vertical rectangular duct wrapping seams connecting pipe, its stud height should be greater than or equal to the angle flange width with the specifications of the duct. The same vertical seams duct specifications, consistent edging height should stand seams, knuckle should dip, straightness deviation uniform Xu 5/1000; seams connecting rivet spacing should not exceed 150mm, indirectly, should be uniform across; Li seams, corners junction riveting, should close, no holes. Engineering specifications, Tianjin Jinzhong Ji integrity engineering (certified), provided by the Tianjin, Hebei Province, Jinzhong Ji HVAC engineering purification equipment. Tianjin Jinzhong Ji HVAC purification equipment Limited (www.Jzjnt.com) is a leader in Tianjin, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the group leadership with the staff warmly welcome all inquiries negotiations to create a better future for the base.