Epoxy powder coating is applied by electrostatic spraying process, forming a film at one time. This epoxy powder coating is a kind of thermosetting coating, which is processed by mixing and destroying solid epoxy resin, curing agent and various additives. The steel pipe is preheated by shot blasting and intermediate frequency before painting, and then […]
After the surface is mechanically damaged, the anti-corrosion spiral steel pipe must be repaired. When the scratches do not cause leakage, the two circular fillet welds between the casing and the steel pipe body do not need to be welded. If it leaks, it needs to be welded. The sleeve is directly subjected to the […]
The quality requirements of galvanized square tubes are very high. However, due to the inevitable corresponding quality defects in each process of steel pipe production, and some steel pipes are in service under some special environmental conditions, in addition to the overall performance of the steel pipe, the accuracy of the outer diameter and wall […]
Common problems can be roughly divided into three types, which are uneven coating, dripping of preservatives, and foaming of preservatives. 1. Uneven coating. The fundamental manifestation of this kind of problem is that the preservative is unevenly distributed on the surface of the steel pipe. Some parts are too thickly coated, while some parts are […]
Galvanized steel strip is processed by ordinary steel strip pickling, galvanizing, packaging and other processes. It is widely used because of its good anti-corrosion performance. It is mainly used to make metal products that are cold-worked and no longer galvanized. For example: metal products such as light steel keels, peach-shaped columns for guardrails, sinks, rolling […]
In order to prolong the service life of pipelines, pipeline anti-corrosion construction has become an indispensable process in the pipeline production process; with the continuous development and production of manufacturers, various types of anti-corrosion spiral steel pipes have appeared on the market. The more common anti-corrosion types of spiral steel pipes on the market are: […]
De kunststof beklede composietbuis is gemaakt van gelaste stalen buis als basismateriaal en wordt gemaakt door zandstralen chemische dubbele voorbehandeling, voorverwarming, kunststofbekleding, uitharding, nabehandeling en andere processen. Het heeft uitstekende uitgebreide eigenschappen, sterke mechanische corrosiebestendigheid, goede chemische stabiliteit en waterbestendigheid, en heeft functies zoals corrosiebestendigheid, drukbestendigheid en [...]
De 3PE-coatingnormen zijn ANSI/AWWA C104/A21.4 American National Standard for Cement-Mortar Lining for Ductile-Iron Pipe and Fittings for Water, ISO 21809 Petroleum and natural gas industries - External coatings for buried or submerged pipelines used in pipeline transportation systems, DIN 30670 Polyethyleen coatings van stalen buizen en hulpstukken. De normale kale buis zal worden gecorrodeerd in [...]
Het basismateriaal van 3PE anticorrosieve stalen pijp omvat naadloze stalen pijp, spiraalvormige stalen pijp en stalen pijp met rechte naad. De anticorrosiecoating uit drie lagen polyethyleen (3PE) wordt veel gebruikt in de oliepijpleidingindustrie vanwege de goede corrosiebestendigheid, waterdampbestendigheid en mechanische eigenschappen. De anticorrosielaag van 3PE anticorrosiestaalpijp [...]
Volgens API5L, GB/T9711.1 de prestatiesvereisten van de pijpleidingsstaalpijp, volgens de verschillende aanmakende temperatuur, kan het aanmaken in het volgende worden verdeeld: 1. Het aanmaken op lage temperatuur (150-250 graden) De microstructuur die door het aanmaken op lage temperatuur wordt verkregen is aangemaakte martensiet. Het doel is om de afschrikspanning en brosheid van het afgeschrikte staal op de premisse [...] te verminderen.
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