Days is China Southern Region ducts leading large-scale nursing care line cable manufacturer, has 10 years of experience in the development and production of galvanized pipe, tank and accessories areas, capacity, output and market share position, according to the South China three indicators District forefront. Pipe technical requirements, grades and chemical composition of galvanized steel pipe steel grades and chemical composition shall comply with GB / T3092 clarinet specified steel grades and chemical composition. 2, a manufacturing method of clarinet (the furnace brazed or welded) selected by the manufacturer. Galvanized hot dip galvanizing method. 3, thread and pipe joints a: galvanized steel with threaded delivery, thread should be galvanized after car system. Threads shall comply with the provisions of YB 822. b: Steel pipe joints shall comply with the provisions of YB 238; malleable iron pipe fittings shall comply with the provisions of YB 230. 4, the mechanical properties of galvanized steel pipe in front of the mechanical properties shall comply with the provisions of GB 3092's. 5, the uniformity of galvanized steel should be galvanized zinc coating layer uniformity test. Steel specimen was immersed in a copper sulfate solution, five times in a row can not be red (copper color). 6, cold bending test is not more than 50mm nominal diameter galvanized steel pipe should be cold bending test. The bending angle 90 °, bending radius of 8 times the outer diameter. Without filler days when tests ducts specifications, samples should be placed outside of the weld or the upper bending direction. After the test tube slots, the sample should not have cracks and peeling of the zinc layer with like. 7, hydrostatic testing hydrostatic test shall be conducted in clarinet days galvanized ducts, eddy current testing can also be used instead of hydrostatic testing. Test pressure or eddy current testing comparative sample size should comply with the provisions of GB 3092. Mechanical properties of steel is an important indicator of days to ensure that the steel end-use properties (mechanical properties) to ducts is China Southern Region's leading nursing care line of large cable manufacturer days ducts price, in hot galvanized pipe, tank, plastic coated metal hose and fittings in the field has 10 years of experience in development and production, capacity, output and market share of the three indicators bits according to the forefront in South China. Welcome to the National Service friends from various circles to visit our factory and negotiate business. Plastic coated metal hose Product Features Material: (inner) tube made of stainless steel or galvanized hose and special insulation treatment; (outer layer) with PVC raw material (anti-UV, anti-aging) Color: black, gray other colors Optional Operating temperature: -40 ℃ ~ + 160 ℃ Features: 1, the package of plastic hose has excellent waterproofing, insulation resistance, tensile strength. 2, including the use of PVC plastic hose surface material, and added to PVC plastic fire retardant. 3, including plastic hose structure for single and double-lock buckle type, increased tensile strength, not easily broken or deformed. 4, good package plastic hose bending performance, smooth interior structure when threading wires and cables easily pass. 5, including plastic hose waterproof, anti-oil, anti-corrosion, sealing well. Product appearance, compact structure, widely used in wire and electrical protection of precision instrumentation wiring, electrical, wire, plastic, rubber and other industries. Days ducts Specifications | ducts | days ducts ducts provided by days. If you have any questions or advice on this information, please contact us now! Our Company Name: Guangdong days Steel Bridge Co. (www.nhtianlai.com) Contact: Mr. Europe, or click on "Commercial Union Service" direct dialogue with us!