{"id":6759,"date":"2024-10-14T18:45:02","date_gmt":"2024-10-14T10:45:02","guid":{"rendered":"https:\/\/wanzhisteels.com\/?page_id=6759"},"modified":"2025-01-20T17:20:18","modified_gmt":"2025-01-20T09:20:18","slug":"seamless-steel-pipe","status":"publish","type":"page","link":"https:\/\/wanzhisteels.com\/uk\/products\/steel-pipe\/seamless-steel-pipe\/","title":{"rendered":"Seamless Steel Pipe"},"content":{"rendered":"
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Seamless steel pipe<\/h1><\/div>\n<\/div><\/div>\n\n\n\n
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What is seamless steel pipe ?<\/h2><\/div>\n\n\n\n

Seamless steel pipe is a long steel strip with a hollow cross-section and no seams around it. It is made by punching a whole round steel bar, and there is no weld on the surface of the steel pipe, which is called a seamless steel pipe. <\/p>\n\n\n\n

Seamless steel pipes have a hollow structure and can be used as pipelines for conveying fluids, such as pipelines for conveying oil, natural gas, coal gas, water and certain solid materials.<\/p>\n\n\n\n

Classification of seamless steel pipe<\/h2><\/div>\n\n\n\n

According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, jacking pipes, etc.<\/p>\n\n\n\n

Steel pipes can be divided into round pipes and special-shaped pipes according to the shape of their cross-sectional area. Special-shaped tubes come in a variety of complex shapes, such as square, oval, triangle, hexagon, melon seed, star, and winged tubes.<\/p>\n\n\n\n

According to different uses, seamless steel pipes can be divided into thick-walled seamless steel pipes and thin-walled seamless steel pipes. It can also be divided into two categories: general purpose (used for water supply, gas pipelines and structural parts, mechanical parts) and special purpose (used for boilers, geological exploration, bearings, acid resistance, etc.).<\/p>\n\n\n\n

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\"Seamless<\/figure><\/div>\n\n\n\n

Hot rolled seamless steel pipe<\/h3><\/div>\n<\/div>\n\n\n\n
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Seamless steel pipe direct<\/h3><\/div>\n<\/div>\n<\/div>\n\n\n\n

The materials of seamless steel pipes include ordinary and high-quality carbon structural steel (Q215-A~Q275-A and 10~50 steel), low alloy steel (09MnV, 16Mn, etc.), alloy steel, stainless acid-resistant steel, etc.<\/p>\n\n\n\n

Production process of seamless steel pipe<\/h2><\/div>\n\n\n\n

The production methods of seamless steel pipes are roughly divided into oblique rolling method (Monnesmann method) and extrusion method. <\/p>\n\n\n\n

The oblique rolling method (Monnesmann method) is to first perforate the tube blank with an oblique rolling roller and then extend it with a rolling mill. This method has a fast production speed, but has high requirements on the machinability of the tube blank. It is mainly suitable for the production of carbon steel and low alloy steel pipes.<\/p>\n\n\n\n

The extrusion method is to use a piercing machine to pierce the tube billet or ingot, and then use an extruder to extrude it into a steel pipe. This method is less efficient than the oblique rolling method and is suitable for the production of high-strength alloy steel pipes.<\/p>\n\n\n\n