XEX
AUTOMATION EQUIPMENT

Ductile pipe tender technical requirements ( A)

by:XEX     2020-12-31
Ductile iron pipe design ductile iron pipes anticorrosive epoxy coating by using cement mortar lining. Outside with spraying zinc corrosion and coating asphalt anticorrosive paint. Metal zinc coating thickness shall be not less than 130 g / ㎡, metal zinc, zinc content of at least 99. 95%. 1. 1 technical requirements. GB/T13295 - 2013 'water and gas pipeline in ductile iron pipes, pipe fittings and accessories'; Outside the pipe lined with cement mortar, spray galvanized asphalt, execute ISO4179 and ISO8179 standard respectively. 3. Within the village comply with ISO 16132 - epoxy seal layer 2004 standard 4. Since the anchor pipe in accordance with GB/T13295 - Test methods, inspection rule, size, shape, weight and allowable deviation, logo, packaging, quality certificate, transportation and storage and technical requirements are in accordance with the GB/T13295 - 2013 standards. 1. 3 mechanical properties of the pipe produced by centrifugal casting process, and must be after annealing treatment, mechanical performance is as follows: tensile strength ( MPa) Yield strength, MPa) Hardness ( HBW) ≥420 ≥300 ≤2301. Interfaces using sliding type T, since the anchor type interface, in line with the GB/T13295 - size The provisions of the 2013 standard. The effective length L = 6000 mm, pressure levels using K9 respectively. The end face of cast iron pipe shall be the vertical axis. Pipe size and deviation should be allowed to meet GB/T13295 - The provisions of the 2013. Weight acceptance: according to the national standard, the standard quality of tolerance margin of error is plus or minus 3%. 1. The material of ductile iron pipe shall be the ferritic matrix of nodular cast iron. In the organization should have a certain amount of spheroidal graphite. Hydrostatic test, tensile strength and elongation should comply with GB/T13295 - The provisions of the 2013 standard. Shall not be greater than 230 HBW surface hardness. Internal and external surface are not allowed to interfere with use of defective. Cast iron pipe internal use cement mortar lining, are made of cement mortar lining epoxy sealing layer, external use asphalt spraying zinc coating, coating, inside and outside surface should be clean, no rust, iron. After coating, inside and outside surface should be smooth, uniform coating, adhesive and firm, not by the cold and hot climate and an exception occurs. Cement mortar lining pipe roughness requirement is less than 0. 013, cement mortar lining with epoxy seal layer pipe roughness requirement is less than 0. 008. Metal zinc coating thickness shall be not less than 130 g / ㎡, metal zinc, zinc content of at least 99. 95%. In the external surface of the socket with white paint spraying insert tags, according to GB/T13295 - 2013 standard. Ductile iron pipe and pipe fittings for each socket provide matching aprons, and provide spare capacity, according to 1% of the total number of synthetic its should be contained in the bid price quotation. Pipe factory bring lined with cement mortar and epoxy coatings, exterior wall coating asphalt, lined with cement ISO4179 standards, bitumen coating outside ISO8179 standard, conform to ISO 16132 - lined with epoxy coatings 2004. The test items, test methods, inspection rule according to GB/T13295 - 2013 standard. 1. 6 nodular cast iron tube parts of the specifications of the pipe size and quality requirements of GB/T13295 - execution 2013 standard.
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