Categorized by manufacturing process
Manufacturing processes for seamless steel pipes can be categorized into basic types: hot rolling (extrusion), cold rolling (drawing), and hot expanding pipes.
(2) Welded pipes can be categorized by manufacturing process into: straight seam welded pipes, spiral seam welded pipes, plate-and-roll butt-welded pipes, and hot-expanded welded pipes.
Categorized by shape
Steel pipes can be categorized by shape into: round pipes, square pipes, rectangular pipes, octagonal pipes, hexagonal pipes, D-shaped pipes, pentagonal pipes, and various other shaped steel pipes such as complex cross-section pipes, double concave pipes, five-petaled plum-shaped pipes, conical pipes, corrugated pipes, melon-shaped pipes, double convex pipes, and more.
Categorized by usage
Steel pipes are categorized by their applications, including pipeline steel pipes, thermal equipment steel pipes, machinery industry steel pipes, oil and geological drilling steel pipes, container steel pipes, chemical industry steel pipes, and special purpose steel pipes, etc.
Liquid Epoxy Coating IPN8710 Corrosion Resistance
I. Composition
Composed of aliphatic polyurethane prepolymer, epoxy resin, pigments, additives, and solvents. Corrosion resistance for equipment, water distribution pipelines, and the surface of drinking water tanks.
II. Performance
This paint is a grafting-type interpenetrating network polymer that initiates polymerization at room temperature. The two networks complement each other, creating a synergistic effect. The film is non-toxic, with high solids and low viscosity, making it a novel anti-corrosive coating with strong adhesion, high strength, resistance to impact and abrasion, hydrolysis, corrosion, and excellent water and weather resistance. It also requires minimal rust removal on steel structures and can be used within a temperature range of -20 to 120°C.
III. Technical Specifications:
Dry Time: Surface dry in 30 minutes, fully dry in 6-24 hours
2. Flexibility: 1mm
3. Impact Resistance: 50cm
4. Adhesion: Grade 1
Four: Construction and Storage:
Before painting, the base iron surface must be treated to Sa2.5 grade, and it is strictly prohibited to introduce moisture, dust, or oil during the application process to ensure the quality of the paint.
(2) The paint ratio is: A component (base material) to B component (hardener) = 9kg of paint to 1kg of hardener (or mixed according to the ratio provided by our factory for application).
(3) The mixing method for construction is: Open the A component wide, add the B component to the A component, and mix thoroughly. Allow to mature for 30 minutes before painting.
(4) This material requires immediate use upon mixing. The paint must be used up within six hours of mixing. Any unused material must be sealed for storage.
(5) Construction should be halted during rainy or overcast weather or when relative humidity exceeds 75%. For areas with severe corrosion medium, it is recommended to apply multiple coats.
(6) Products should be stored in a cool, dry place, away from direct sunlight, fire sources, and heat.
(7) Storage period is 12 months. After expiration, all technical specifications should be inspected. If they meet the requirements, they can be continued to be used.
Fused Epoxy Powder Coating for Corrosion Protection
Melted Epoxy Powder, also known as thermosetting epoxy resin heavy-duty anticorrosion powder, is a solid material transported and dispersed by air. When applied to the preheated surface of steel products, it melts, levels, and cures to form a uniform coating. This heavy-duty anticorrosion coating is formed under high temperatures. The coating offers advantages such as simple application, non-pollution, excellent impact and flexural resistance, and high temperature resistance.
Classification of fusion epoxy powder:
1) Divided by application methods: pipeline internal spray powder, pipeline external spray powder, and universal pipeline spray powder. The external spray powder is further categorized into: single-layer powder, double-layer powder, and triple-layer structural anti-corrosion powder.
2) Divided by usage, they include: powder for oil and natural gas pipelines, drinking water pipelines, fire-fighting pipelines, anti-static ventilation pipelines for coal mines, chemical industry pipelines, oil drilling pipes, pipe fittings, ship pipelines, and high-salinity heavy-duty corrosion-resistant pipelines, etc.
3) Curing conditions can be divided into two types: rapid curing and standard curing. Rapid curing powder typically cures at 230℃ for 0.5 to 2 minutes, mainly used for external pipe coating or three-layer corrosion protection structures. Due to its short curing time and high production efficiency, it is suitable for assembly line operations. Standard curing powder usually cures at 230℃ for over 5 minutes, with good leveling of the coating, making it suitable for internal pipe coating.
Corrosion prevention method for fused epoxy powder:
Primarily including electrostatic coating, thermal spraying, aspiration, fluidized bed coating, and rolling coating methods. Internal pipe coating generally uses friction electrostatic spraying, aspiration, or thermal spraying; all these spraying methods share a common characteristic that requires pre-heating the workpiece to a certain temperature before spraying to allow the powder to melt upon contact. The residual heat should enable the coating to continue flowing and further level out to cover the entire surface of the steel pipe, especially in concave areas of the pipe and on both sides of the welds. The molten coating fills in to smooth out, ensuring a tight bond between the coating and the steel pipe, minimizing porosity, and solidifies within the specified time frame before being water-cooled to stop the curing process.
