3PE tiv thaiv-corrosion (feem ntau hu ua3PE txheej yeeb nkab or three-layer polyethylene anti-corrosion coating) is a composite anti-corrosion coating system widely used in buried and overhead steel pipelines. This technology combines the advantages of 2PE anti-corrosion layers from Europe and epoxy powder coating (FBE) widely used in North America, forming a three-layer protective layer: the bottom layer is fusion-bonded epoxy powder (FBE, typically >100μm tuab), nruab nrab txheej yog cov nplaum (AD, feem ntau 170-250μm tuab), thiab txheej txheej yog polyethylene (PE, feem ntau 1.8-3.7mm tuab). Peb txheej yog fused ua ke los ntawm cov txheej txheem tshwj xeeb thiab ruaj khov rau cov yeeb nkab steel.
Cov yam ntxwv zoo
Peb -Txheej Synergistic nyhuv
- Hauv qab Txheej (Epoxy Powder FBE): Thickness Ntau dua lossis sib npaug ntawm 80μm, tsim cov tshuaj sib txuas rau cov yeeb nkab steel nto los ntawm electrostatic txau, muab cov tshuaj tiv thaiv zoo heev thiab cathodic disbondment kuj. Piv txwv li, hauv cov av acidic, epoxy txheej tuaj yeem tiv taus qhov yaig ntawm corrosive yam xws li hydrogen sulfide.
- Nruab Nrab Txheej (Adhesive AD): Thickness 170-250μm, tsim los ntawm polyolefin copolymer, muaj ob pawg polar thiab non-polar, tsim cov tshuaj bonds thiab lub cev entanglement nrog epoxy thiab polyethylene txheej raws li, ua kom muaj kev sib khi nruj ntawm peb txheej.
- Txheej txheej (Polyethylene PE): Thickness 1.8-3.7mm, siab-density polyethylene (HDPE) muab kev tiv thaiv txhua yam, muaj kev cuam tshuam- tiv taus, abrasion-resistant, thiab aging-resistant, thiab tuaj yeem tiv taus av kev ntxhov siab thiab kev puas tsuaj. Piv txwv li, nyob rau hauv ib puag ncig permafrost, PE txheej tswj nws qhov yooj, tiv thaiv brittleness thiab tawg.
Kev Ua Haujlwm Zoo
- Ntxiv -ntev lifespan: Comprehensive corrosion resistance extends pipeline lifespan to over 50 years, deb tshaj li cov txheej txheem tiv thaiv corrosion (xws li roj av asphalt, uas tsuas yog 10-15 xyoo).
- Kev tiv thaiv ib puag ncig tsis zoo: Kev ua haujlwm ruaj khov hauv ib puag ncig xws li -50℃txog 80 degree, yoog tau rau cov xwm txheej nyuaj xws li suab puam, dej hiav txwv, thiab permafrost.
- Kev ntseeg siab: Kev nqus dej tsawg dua 0.01%, rwb thaiv tsev tiv thaiv Ntau dua lossis sib npaug ntawm 10¹³ Ω・m, zoo cais cov dej noo thiab electrolytes, tiv thaiv electrochemical corrosion.
Cov txheej txheem ntau lawm thiab kev tswj xyuas zoo
1. Core Production Flow
Kev kho deg: Sandblasting mus rau qib Sa2.5, roughness 50-90μm, ua kom cov txheej adhesion.
Nruab nrab zaus cua sov: cua sov steel yeeb nkab rau 200-230℃kom yaj thiab solidify epoxy hmoov.
Peb - Txheej Txheej:
Epoxy Spraying: Electrostatic txau ntawm epoxy hmoov, thickness yuam kev Tsawg dua los yog sib npaug rau ± 10%.
Adhesive Extrusion: Kub tswj ntawm 200-230 degree, sab winding lossis ncig tuag wrapping.
Polyethylene Txheej: Npog nrog PE txheej siv lub tshuab extruder lossis tshuab winding, thickness uniformity yog kuaj hauv online.
Kev ntsuas cua txias thiab ntsuas: Tom qab dej txias thiab teeb tsa, kev ntsuas hluav taws xob hluav taws xob (Ntau dua lossis sib npaug ntawm 25kV), ntsuas qhov tuab, thiab ntsuas adhesion tau ua.
2. Cov Qauv Zoo
Cov qauv hauv tsev: SY / T0413-2002 (Polyethylene Anticorrosion Txheej rau faus Steel Pipelines), GB / T23257-2017 (Technical Standard for Polyethylene Anticorrosion Coating for Buried Steel Pipelines).
International Standards: DIN30670 (Lub teb chaws Yelemees), ISO21809-1/2 (International).
Cov ntsiab lus tseem ceeb:
Peel Strength: Ntau dua lossis sib npaug li 70N / cm ntawm chav tsev kub, Ntau dua lossis sib npaug rau 40N / cm ntawm 50 degree.
Impact Resistance: Ntau dua lossis sib npaug ntawm 10J / mm ntawm -30℃yam tsis muaj kev tawg.
Cathode Discharge: Peel vojvoog Tsawg dua lossis sib npaug li 15 hli ntawm 65℃rau 48 teev.
Cov lus pom zoo xaiv thiab kho
1. Kev xaiv xaiv
Environmental Compatibility: Xaiv cov qib anticorrosion (zoo tib yam / ntxiv dag zog) raws li av corrosivity (xws li, pH tus nqi, resistivity).
Pipe Diameter Matching: Rau DN Tsawg dua los yog sib npaug rau 100mm, tag nrho thickness Ntau dua los yog sib npaug rau 2.0mm yog pom zoo; rau DN Ntau dua los yog sib npaug rau 500mm, yuav tsum muaj thickness Ntau dua los yog sib npaug rau 3.5mm. Cov ntaub ntawv pov thawj: Cov neeg muab khoom yuav tsum muab ISO 9001 daim ntawv pov thawj thiab thib peb -cov ntaub ntawv xeem (xws li SGS).
2. Kev tsim kho thiab tu
Kev Tiv Thaiv Kev Tiv Thaiv: Tsis txhob muaj kev puas tsuaj rau cov txheej txheem. Tom qab vuam, siv lub tes tsho kub hnyiab los kho kev sib koom ua ke kom muaj zog tev ntau dua lossis sib npaug li 70N / cm.
Kev Tiv Thaiv Cathode: Siv ua ke nrog kev txi anode lossis yuam kev tam sim no. Kev tiv thaiv muaj peev xwm tsawg dua lossis sib npaug ntawm -0.85V (CSE).
Kev tshuaj xyuas tsis tu ncua: Ua kev tshawb xyuas kev khawb txhua txhua 5 xyoos, tsom rau cov welds thiab lub luj tshib.