Changsha Xiangjia Metal Materical Co., Ltd.

What are the effects of material elements on the performance of  steel square tube ? (1) Carbon: the higher the carbon content, the higher the hardness of the steel, but the poorer its plasticity and toughness. Therefore, the carbon element affects the hardness and toughness of steel square tubes. (2) Sulfur: it is a harmful impurity in steel. Steel with a relatively high sulfur content is prone to brittle fracture when pressure processed at high temperatures, which is usually called hot brittleness. Sulfur is a weight index reflecting the brittle fracture performance of square tubes. (3) Phosphorus: it can significantly reduce the plasticity and toughness of square tube steel, especially in low temperatures, and it's called cold brittleness. In high-quality steel, sulfur and phosphorus should be strictly controlled. But on the other hand, in low-carbon steel square tubes with relatively high sulfur and phosphorus, it can make the cutting easy to break, which is beneficial to impro...

According to the different process requirements of different customers, there are various methods for the length measurement system of   straight seam steel pipe , mainly are the following types: 1. Raster ruler for length measurement Measuring the length with a raster ruler is to install two raster rulers of fixed length on the outside of both ends of the straight seam steel pipe. The raster ruler is driven by the pole columns close to both ends of the steel pipe, and the length of the straight seam steel pipe is measured by the interference phenomenon of light. The length measurement accuracy with a raster ruler is very high. However, the raster ruler is expensive and difficult to maintain, so it is very sensitive to the influence of dust and on-site vibration. 2. Camera for length measurement Measuring the length with a camera is to realize the measurement of the steel pipe length through image processing. The principle is to install a series of photoelectric switches at equal d...

The   X60 straight seam steel pipe   is a grade in the American standard. X60 is the steel grade stipulated by the American Petroleum Institute standard (APL). Its chemical composition: C is less than or equal to 0.28, and MN is less than or equal to 1.40. The yield strength (MPA) of the first-class product is greater than or equal to 414, and the tensile strength (MPA) is greater than or equal to 547. The yield strength (MPA} of the second-class product has a minimum value of 414, and the tensile strength (MPA) of the second-class product has a maximum value of 565. It is equivalent to the steel grade L415 stipulated in the GB/T9711.1 standard in China. X60 is equivalent to the steel grade L415 stipulated in the GB/T9711.1 standard in China. X42 is L290 in China. X52 is L390 in China.

The insulation structure of the   steel jacketed steel insulation pipe   is divided into: internal sliding type and external sliding type according to different sliding methods. Internal sliding type: The insulation structure is composed of working steel pipe, aluminum silicate, drag reduction layer, microporous calcium silicate, insulation layer, stainless steel fastening steel band, aluminum foil reflective layer, polyurethane insulation layer, outer jacket steel pipe, and external anti-corrosion layer (basically no longer used). External sliding type: The insulation structure is composed of working steel pipe, glass wool insulation and heat insulation layer, aluminum foil reflective layer, stainless steel fastening band, sliding guide support, air insulation layer, outer protection steel pipe, and external anti-corrosion layer. Anti-corrosion layer: Protect the outer steel pipe from being corroded by corrosive substances and extend the service life of the steel pipe. Outer ...