12Cr1MOVG Seamless Alloy Steel Tube Factory Price Directly For Large Diameter Alloy Tube Customization
Steel tubes are divided into seamless steel tubes and welded steel tubes. Seamless steel tube production process is the solid tube billet or steel ingot into hollow capillary, and then rolled into the desired size of the steel tube. Different methods of perforating and rolling are used to produce seamless steel tubes. The production process of welded steel pipe is to bend the steel billet (steel plate or strip) into a tube shape and then weld the gap to become steel pipe. Because of the different forming and welding methods used, different methods of producing welded steel pipe are formed.
Seamless steel tubes are mainly produced by hot rolling. The extrusion method is mainly used in the production of difficult to perforate low plastic high alloy steel pipe or special-shaped steel pipe and composite metal pipe. The hot rolled pipe can be processed into small diameter and thin wall steel pipe by cold rolling and cold drawing. The welding steel pipe process is simple, the production efficiency is high, the cost is low, the product variety expands day by day. Seamless and welded steel tubes
Delivery length is also called customer required length or contract length. The standard has the following provisions on delivery length:
A, ordinary length (also known as irregular length) : where the length is within the standard length range and there is no fixed length requirements, are called ordinary length. For example, structural pipe standards: hot rolled (extruded, expanded) steel pipe 3000mm ~ 12000mm; Cold-drawn (rolled) steel pipe 2000mm ~ 10500mm.
B. Fixed length: the fixed length shall be within the normal length range and is a fixed length specified in the contract. But in practice, it is impossible to cut absolute length, so the standard stipulates the allowable positive deviation value for the length of definite length.
The structural pipe standard is:
The yield of fixed length pipe decreases more than that of normal length pipe, so it is reasonable for the manufacturer to raise the price. Add price range each enterprise is not consistent, add price 10% or so on base price foundation commonly.
C. Length of multiples: the length of multiples shall be within the normal length range, and the single length and the multiple of the total length shall be indicated in the contract (e.g. 3000mm×3, i.e. 3000mm 3x, with a total length of 9000mm). In practice, the allowable positive deviation of 20mm should be added to the total length, plus the incision allowance should be left for each single ruler length. Take the structural pipe as an example, the specified incision allowance: outer diameter ≤159mm is 5 ~ 10mm; Outer diameter >159mm is 10 ~ 15mm.
If there is no length deviation and cutting allowance in the standard, it shall be indicated in the contract through negotiation between the supply and demand parties. Double ruler length is the same as fixed ruler length, which will greatly reduce the yield of production enterprises. Therefore, it is reasonable for the production enterprises to raise the price, which is basically the same as the fixed ruler length
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12Cr1MOVG Seamless Alloy Steel Tube For Large Diameter Alloy Tube Customization Images
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