Applicable Industry Standard: SY/T 0447‑2014 Technical Standard for Epoxy Coal‑tar Anticorrosive Coating of Buried Steel PipelinesThe whole process consists of five stages: Factory Pre‑fabrication of Anticorrosive Coating → Hoisting & Welding of Pipes → Field Joint Coating & Repair of Damages → Pipe Lowering and Backfilling in Trench → Completion Acceptance Construction Environmental Requirements Construction […]
In accordance with SY/T 0447‑2014 Technical Standard for Epoxy Coal‑Tar Coating of Buried Steel Pipelines, combined with coating material mechanism, on‑site engineering practice and long‑term ageing law of anti‑corrosion coating, the applicable temperature range of coal‑tar epoxy anticorrosive steel pipe is defined precisely from four dimensions: long‑term operating temperature of conveyed medium, transient peak temperature, […]
The anti-corrosion system complies with SY/T 0447-2014 Specification for Epoxy Coal Tar Anti-Corrosive Coating of Buried Steel Pipelines. Classification is mainly based on anti-corrosion structural grade, together with other grouping methods as below. Classified by Anti-Corrosion Structure (Most Widely Adopted in Engineering) Ordinary Grade: One Coat & One Cloth Structure: 1 primer coat + 1 […]
Plastic-coated steel pipes feature metal substrates compounded with thermosetting or thermoplastic anticorrosive coatings. Their testing system falls into three major categories: incoming raw material re-inspection, offline type inspection of finished products, and non-destructive on-site installation testing. All tests focus on four core indicators: mechanical properties of substrates, coating bonding stability, anti-corrosion sealing performance and service […]
ASTM A795 is a dedicated carbon steel pipe standard for the North American fire protection industry, specially formulated for building automatic fire suppression systems. It covers both welded and seamless pipes. Unlike general-purpose fluid galvanized pipes, all performance, process and testing requirements of this standard are formulated for the core working conditions of fire protection […]
Roll grooving is a critical process for grooved connection of plastic-coated steel pipes, which directly determines the sealing performance and structural safety of piping systems. In accordance with CJ/T 156 Grooved Pipe Couplings and CJ/T 120 Water Supply Plastic-Coated Composite Steel Pipes, this article elaborates on the full-process professional operation requirements, with emphasis on coating […]
On-site welding construction of hot-dip galvanized steel pipes, It focuses on controlling zero weld defects, qualified structural strength and complete post-welding anti-corrosion performance, so as to eliminate quality problems such as pores and cracks caused by zinc layer vaporization. Pre-welding Preparation Requirements Pipe Inspection: Check the specifications, wall thickness and material of galvanized pipes before […]
Phenolic epoxy painted steel pipes are high-performance anti-corrosion pipes that form a dense protective layer by uniformly applying phenolic epoxy paint on the surface of steel pipes and curing it. They combine the strong adhesion and high corrosion resistance of epoxy resin with the high temperature resistance and solvent resistance of phenolic resin, making them […]
Polyurethane paint is a mainstream topcoat system for steel pipe anti-corrosion coating due to its excellent weather resistance, chemical corrosion resistance, high adhesion and mechanical properties. Its selection must strictly follow the core principles of “environment adaptation, performance matching, system compatibility, and construction feasibility”, and combine with the steel pipe’s service environment, corrosion level, operating […]
Oil contamination on the surface of galvanized steel pipes mainly derives from antirust oil, drawing oil, cutting oil generated during rolling, cold drawing, storage and transportation, as well as oil-dust mixtures. The core principles of degreasing are no damage to the zinc coating, no residue, and compatibility with subsequent processing. A combined physical and chemical […]
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