Days ducts is China's leading large southern district nursing care line cable manufacturer, has 10 years of experience in the development and production of galvanized pipe threading specifications, capacity, output and market share in hot galvanized pipe, tank and accessories field three indicators bit according to the forefront of South China. Galvanized steel construction prone to problems and solutions: (c) roller slot machines roll forming trench shall meet the following requirements: 1. The pipe end to the groove segment surfaces should be smooth and no bump, no roller marks. 2. The trench wall concentric circle should be galvanized pipe threading, groove width, depth should meet the requirements, and check clamp piece model is correct. 3. Lubricate the rubber seals and check whether there is damage rubber seals, lubricants, oil lubricants should not be used. Days ducts with strong corporate and brand market effect, the continued introduction of advanced production technology, first-class production testing equipment, specialized personnel, have access to the Guangzhou Municipal Bureau of Quality Supervision, Inspection issued "CTA quality certification" "Product Inspection Report "and won the" China Construction preferred products "and" trust the quality of products "and" National Fire project selected products "," National Fire Protection Building Material Test Report "," Chinese famous brand "honorary certificate. ① tensile mechanical properties of steel (σb) samples during stretching, the pull-off exposure to the most vigorous (Fb), out (So) resulting in a sample of the original cross-sectional area of ??stress (σ) Guangdong hot galvanized pipe threading, called the tensile strength (σb) threading galvanized pipe manufacturers, in units of N / mm2 (MPa). It represents a metal material to resist damage under tension maximum capacity. The formula is: Where: When Fb-- specimen pull off exposure to the most vigorous, N (Newton); So-- original specimen cross-sectional area, mm2. Guangdong _ galvanized pipe threading galvanized pipe threading pipe manufacturers days _ galvanized pipe threading slot provided by the Guangdong days Pipe Bridge Limited. Guangdong days steel bridge Limited (www.nhtianlai.com) Guangdong Foshan, steel leader, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the days leading ducts staff warmly welcome all inquiries negotiations to create the days ducts a better future.