ADD: Yangzhuang, Zhenwu Town, Jiangdu District, Yangzhou City, Jiangsu Province
How to choose the steel bar of the core mold vibration pipe machine?
How to choose the steel bar of the core mold vibration pipe machine
Many customers have consulted about how to select the steel bars when using the core mold vibrating cement pipe making machine as a cement pipe. Below, our company will give a simple answer to the problem of steel bars in the core mode vibration:
1. The steel bar must be accompanied by the quality certificate of the steel bar manufacturer. The cold-rolled ribbed steel bars entering the factory should be stacked and used according to the steel number, grade and specification, and should have obvious signs and should not be stored outdoors. .
2. The cold-rolled ribbed steel bars entering the factory shall be inspected and accepted according to the following regulations.
1 Rebar should be accepted in batches. Each batch should be composed of the same steel grade, the same specification and the same grade of steel. Each batch should be no more than 50 tons. Each batch of steel bars should have a certificate of quality at the factory, and each plate or bundle should have a sign. .
2Extract 5% (not less than 5 or 5 bundles) per batch for inspection of physical dimensions, surface quality and weight deviation. The results of inspection shall comply with the provisions of GB13788.
3 The mechanical properties and process properties of the steel bars shall be tested on a disk-by-disk basis. 50 mm shall be subtracted from either end of each plate. Two samples shall be taken afterwards, one for tensile strength and elongation test and the other for cold bending test. If the indicator does not comply with the provisions of this regulation, it is judged that the disc is unqualified.
4 pairs of 550 grade steel bars shall be tested in bundles. Two specimens shall be taken from the same steel bar in each bundle, one for tensile strength and elongation test and the other for cold bending test. If there is an indicator If it does not meet the requirements of the regulations, it shall be re-examined in double the quantity of the bundle of steel bars. If one of the samples is unqualified, the bundle of steel bars is judged to be unqualified.