Categorized by manufacturing process
Manufacturing processes for seamless steel tubes can be categorized into the following basic types: hot rolling (extrusion), cold rolling (drawing), and hot expansion.
(2) Welded pipes can be categorized by manufacturing process into: straight seam welded pipes, spiral welded pipes, plate-to-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-petal plum blossom-shaped pipes, conical pipes, corrugated pipes, melon-shaped pipes, and double convex pipes, etc.
Categorized by Application
Steel pipes are categorized by their applications, including pipeline steel pipes, heat exchanger 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 for Corrosion Protection
I. Composition
Composed of aliphatic polyurethane prepolymer, epoxy resin, pigments, additives, and solvents. Corrosion prevention for equipment, water distribution pipelines, and drinking water tank surfaces.
II. Performance
This paint is a grafting interpenetrating network polymer, which undergoes polymerization at room temperature. The two networks complement each other, creating a synergistic effect. The coating is non-toxic, features high solid content and low viscosity, and is a novel anti-corrosive paint with strong adhesion, high strength, resistance to impact and abrasion, hydrolysis, corrosion, and excellent water and weather resistance. It also has low requirements for rust removal on steel structures and can be used within a temperature range of -20 to 120°C.
Section 3: Technical Specifications:
1. Drying 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:
Prior to painting, the base iron surface must be treated to Sa2.5 grade. Strictly prohibit the entry of moisture, dust, and oil during application to ensure the quality of the paint job.
(2) The paint ratio is: A component (base material) to B component (curing agent) = 9kg of paint to 1kg of curing agent (or mixed according to the ratio provided by our factory for application).
(3) The mixing ratio for application is as follows: 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 is to be used immediately upon mixing. The paint must be used within six hours of mixing. Any unused material must be sealed for storage.
(5) Construction should be halted during rainy or cloudy weather, or when the relative humidity exceeds 75%. For areas with severe corrosion, 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 sources.
(7) Storage period is 12 months. Upon expiration, all technical specifications should be inspected. If they meet the requirements, they may continue to be used.
Fused Epoxy Powder Coating for Corrosion Protection
Melting Epoxy Powder, also known as thermosetting epoxy resin for heavy-duty corrosion protection, is a solid material conveyed and dispersed by air. Applied to the preheated surface of steel products, it melts, levels, and solidifies to form a uniform coating for corrosion protection, which is a heavy-duty corrosion-resistant coating formed under high temperatures. The coating offers the advantages of easy application, non-pollution, good impact and bending resistance, and high temperature resistance.
Fused Epoxy Powder Classification:
1) Divided by application method: Pipeline Internal Spraying Powder, Pipeline External Spraying Powder, Universal Pipeline Spraying Powder. The Pipeline External Spraying Powder is further categorized into: Single-Layer Powder, Double-Layer Powder, and Three-Layer Structural Corrosion Protection Powder.
2) By application, they can be categorized into: pipeline powders for oil and natural gas, drinking water pipelines, fire protection pipelines, anti-static ventilation pipeline powders for coal mines, chemical pipeline powders, oil drill pipe powders, fitting powders, ship pipeline powders, and heavy-duty corrosion-resistant pipeline powders for high-salinity water, etc.
3) Categorizable by curing conditions into: quick curing and standard curing types. Quick curing powder typically cures at 230℃/0.5~2min, mainly used for external pipe coating or three-layer anti-corrosion structures. Due to its short curing time and high production efficiency, it's suitable for assembly line operations. Standard curing powder usually cures at 230℃/5min or more, offering good leveling of the coating, making it ideal for internal pipe coating.
Corrosion prevention methods for fused epoxy powder:
Primarily including: electrostatic powder coating, thermal spray coating, aspiration method, fluidized bed coating, and rolling coating. Internal pipeline coating generally employs methods such as friction electrostatic spraying, aspiration, or thermal spraying. These coating methods share a common characteristic: the workpiece needs to be preheated 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 leveling to cover the entire surface of the steel pipe, particularly in凹陷 areas and at the sides of welds, allowing the molten coating to fill in and bond tightly with the steel pipe, minimizing porosity as much as possible. The coating should then cure within the specified time and be cooled with water to terminate the curing process.
