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Preliminary treatment and use of straight seam steel pipes
Preliminary treatment of straight seam steel pipes: non-destructive testing inside the weld. Since this pipe is an extra-large steel pipe in the water supply project, especially the steel pipe with a thickness of t=30mm is used as a pipe bridge, it must withstand both the internal water pressure ...Read more -
Advantages of plastic-coated steel pipe as cable protection pipe
Plastic-coated pipes are coated pipes that not only have good corrosion resistance but also have good electrical insulation and low water absorption, extending the service life of the pipes and achieving long-term use. Advantages of plastic-coated steel pipes as cable protection pipes: 1. Suitabl...Read more -
What are the acceptance criteria for steel pipes
① Steel pipe wall thickness inspection: micrometer, ultrasonic thickness gauge, no less than 8 points at both ends and recorded. ② Steel pipe outer diameter and ovality inspection: snap gauge, vernier caliper, ring gauge, measuring point, minimum point. ③Steel pipe length inspection: steel tape m...Read more -
There is no hidden danger in the mixed-use of galvanized pipe and galvanized seamless steel pipe
Galvanized pipe, also known as galvanized steel pipe, has the advantages of thick hot-dip galvanized layer, uniform coating, strong adhesion, and long service life. The hot-dip galvanized seamless steel pipe has a hollow section and is used as a pipeline for transporting fluids, such as pipelines...Read more -
Common defects in the welding area of spiral steel pipe
1. Bubbles Bubbles mostly occur to the center of the weld bead. Hydrogen is still hidden in the weld metal in the form of bubbles. The main reason is that the welding wire and flux have moisture on the surface. They are used directly without drying, and the current is relatively high during the w...Read more -
What are the advantages of plastic-coated composite steel pipe
Plastic-coated composite steel pipe is based on a welded steel pipe and seamless steel pipe, and the inner and outer walls are coated with epoxy resin or polyethylene powder. It is an anti-corrosive, corrosion-resistant, non-toxic, and non-radiation green environmental protection pipe, which is u...Read more -
Control Measures for Submerged Arc Steel Pipe Welding
Submerged arc steel pipe has become the steel pipe of large-scale oil and gas transportation projects at home and abroad due to its large wall thickness, good material quality and stable processing technology. In large-diameter submerged arc steel pipe welded joints, the weld seam and heat-affect...Read more -
Galvanized steel pipe classification
1. Hot-dip galvanized pipe. Let the molten metal react with the iron matrix to produce an alloy layer, allowing the matrix and coating to bond. Hot-dip galvanizing must first pickle the steel pipe to remove the iron oxide on the surface of the steel pipe. After pickling, it must be cleaned with a...Read more -
Main use and process characteristics of galvanized steel pipe
The main purpose of galvanized steel pipe Galvanized pipes are usually used to loosen gas and heating. Galvanized pipes are also used as water pipes. However, after a few years of use, a large amount of rust will be generated. The yellow water that flows out will not only contaminate sanitary war...Read more -
What are the classifications of stainless steel pipes
1. Stainless steel pipes are classified by material Divided into ordinary carbon steel pipes, high-quality carbon structural steel pipes, alloy structural pipes, alloy steel pipes, bearing steel pipes, stainless steel pipes, as well as bimetallic composite pipes, plating and coating pipes to save...Read more -
Key points of internal thread tapping of stainless steel pipe fittings
1 Tap design and manufacture a. Choose a better tap material. Adding special alloy elements to ordinary high-speed tool steel can significantly improve the wear resistance and toughness of the tap. b. Coating titanium nitride coating into the surface of the tap thread can significantly improve th...Read more -
How to seal threaded steel pipe fittings
Through the colorless tape (plaster tape) on the thread, this is more efficient. 1. First, apply lead oil evenly on the outer thread of the thread, then evenly wind the hemp wire in a clockwise direction, and then screw on the inner wire steel pipe fittings and connectors (this method is a method...Read more
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