Jan. 07, 2021
Spiral steel pipe is a spiral steel pipe made of strip steel coil as raw material, extruded at regular temperature and welded by the automatic double-wire double-sided submerged arc welding process. With the advanced double-sided submerged arc welding process, it can be welded at the best position, and it is not easy to have defects such as misalignment, weld deviation and unwell through, which makes it easy to control the welding quality.
The material of spiral steel pipe, commonly used in China: Q235A, Q235B, Q345B L245 L290 X42 X46 X70 X80.
Mechanical properties of spiral steel pipe is an important indicator to ensure the final use of spiral steel pipe (mechanical properties), which depends on the chemical composition of the steel pipe and heat treatment system. So according to the different requirements of use, from the tensile strength, yield point, elongation of these aspects to introduce the specific spiral steel pipe mechanical properties.
With the yield phenomenon of metal materials, the specimen in the tensile process, the stress when the force does not increase (remain constant) can continue to elongate, called the yield point. If the force decreases, the upper and lower yield points should be distinguished. The unit of yield point is N/mm2 (MPa).
The maximum force (Fb) that a specimen undergoes in tension when it is pulled, the stress (σ) obtained by the original cross-sectional area (So) of the specimen, is called the tensile strength (σb) in N/mm2 (MPa). It represents the maximum capacity of a metal material to resist damage under tension.
In the tensile test, the percentage of the increase in the length of the specimen after it is pulled from its mark to the length of the original mark is called elongation. It is expressed in σ, and the unit is %.
1. The storage place or warehouse of spiral steel pipe products should be located in a clean, well-drained place, should be cleared of weeds and all debris, and the steel should be kept clean and away from factories and mines that produce harmful gases or dust.
2. Acid, alkali, salt, cement and other corrosive steel materials should not be stacked in the warehouse, and different types of steel should be stacked separately. Prevent confusion and contact corrosion.
3. Small and medium-sized sections, wire rod, rebar, medium-diameter steel pipe, steel wire and wire rope, etc. After laying and padding can be stored in a well-ventilated shed.
4. Small steel, thin steel plate, steel strip, silicon steel sheet or thin-walled spiral steel pipe can be stored. A variety of high-value, corrosion-prone cold-rolled and cold-drawn steel and metal products can be stored.
The above information is provided by a spiral steel pipe supplier.
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