Pre-welding of straight seam steel pipes : pre-welding includes seams and welds. 1. The joint (...
1. Impact toughness of large-diameter steel pipe : The load acting on the machine part at a high ...
There are two main differences between oil casing and oil drill pipe: 1. Different uses; 2. Diff...
After a series of treatments such as forming, welding, and cooling, the spiral steel pipe still ...
Surface casing: install the oil casing head on the top, suspend and support the subsequent layer...
1. Welding temperature control of thick-walled steel pipe : The welding temperature is affected...
At present, the commonly used methods for welding steel pipes are electrode arc welding (SMAW), ...
First, the principles of acceptance of spiral steel pipes : The quality inspection and acceptan...
1. The use of large-diameter straight seam welded steel pipes can be divided into oil well pipes...
What are the common connection methods of 3PE anti-corrosion steel pipes ? (1) Welding connecti...
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