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Process Classification Of Calvanized Seamless Steel Pipe

Date:2018-11-07    keywords:seamless steel pipe
1. Medium and heavy plate unit: It is an important production wide and thick plate for the production of straight seam submerged arc welded pipe, which is widely used in the main line of oil and gas high pressure transportation.

2. Furnace rolling mill: The furnace rolling mill includes a reciprocating roughing mill and a 4-roller to the finishing mill.

3. Semi-continuous rolling mill: including 1 rack furnace rolling mill and 5 rack finishing mill. On a semi-continuous rolling mill, the hot rolling experienced by the pipe in the finishing pass is substantially constant from one end of the pipe to the other. The time between the passes on the finishing mill is less than 3s on weekdays.

The output roller road includes a laminar cooling system and a take-up station. On the furnace rolling mill, the thermomechanical history of the entire length of stainless steel stamped elbow fittings has changed significantly, especially in the production of micro-stainless steel stamped elbow fittings, which will seriously affect the recrystallization level and grain growth occurring on the finishing mill. Precipitation, and incurring a drastic change in the ultimate microstructure and performance of all stainless steel stamped elbow fitting lengths. Two hot coil mills were installed on the conveyor lines on both sides of the finishing mill.

4. Csp continuous casting and rolling: in the csp production line for the low-carbon manganese steel containing niobium, vanadium, titanium composite microalloying, using the appropriate controlled rolling and cooling and coiling process, can ensure the mechanical properties and microscopic of the pipe The technical requirements for the construction of the ancient x60 stainless steel stamping elbow are consistent with the trend of the ancient stainless steel stamping elbow fittings. China's csp continuous casting and rolling production line has been opened to x60 stainless steel stamping elbow fittings, while the rest of the US and overseas csp production plants have opened up and produced high-grade stainless steel stamping elbow fittings x60, x65 and x70.

The characteristic of the process is the central segregation of the continuous casting thin slab. The galvanized seamless steel pipe eliminates the central segregation of the continuous casting thin slab, which is the key to further improve the quality of the stainless steel stamping elbow fittings. The sheet used in the stainless steel stamping elbow is mainly used in the 60-70s. A3, 16mn produced by the manufacturer, as the pipe diameter increases and the conveying pressure progresses, the strength of the pipe fittings can not be satisfied. After the 1980s, various petroleum welded pipe fittings factories began to use pipeline steel plates produced according to the American api standard. Because the domestic stainless steel stamping elbow plate production factory was not mature at the time, it was important to adopt the inlet plate.

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