Anti-corrosion steel pipe ni gaw, dai ni na aten na hpaga lam hte npawt nhpang gawgap ai lam ni hta n mai malap ai arung arai langai mi rai nga ai. Shanhte a hkrang shapraw ai lam a quality gaw shanhte a daw jau ai prat hte shim lum lam hpe hkrak dawdan ya ai. Sau, wan sau, tsi mawan, mare kata na engineering hpaji ni hta pipeline ni a matu corrosion hpe ninghkap lu ai atsam ni hpe matut nna jat wa ai hte maren, anti{3}}corrosion steel pipe ni a matu galaw shapraw ai hpaji masa mung matut manoi hpaji ningnan ni hpe jai lang nga ai. Ndai laika buk gaw, anti{5}}corrosion steel pipe ni a matu core forming process hpe sung sung sawk sagawn nna, madung lam ni kaw na galaw shapraw ai lam hpe ahkyak ai hpaji masa lam ni de tup hkrak sawk sagawn na re.
I. Anti-}corrosion Steel Pipes ni a npawt tara ni hpe hpaw shabawn ai
Anti{0}}corrosion steel pipe ni gaw, madung hku nna, n-gang pipe substrate hpe, laksan ladat langai hku nna, anti{1}}corrosion material a layer langai (sh) law law hte ka-up da ai, "base material +{3}}corrosion layer a hpawng de ai hkrang hpe hpaw shabawn da ai. Ndai hkrang shapraw ai lam a madung yaw shada lam gaw, n-gang pipe a jak rung atsam (compressive hte hkra machyi ai lam hpe ninghkap lu ai zawn re ai) hpe kam hpa na matu rai nna, n-gun ja ai grup yin ni hta pipe a matu galu kaba ai{6}}corrosion layer a n-gun, n-gun n-gun n-gun, hte chemical stability hpe hkrak hkrak hkang lu na matu re (hkum hkrang n-gun kaba ai, n-gun ja ai acid, alkalis, hte sau hka htung ni zawn re ai).
Htunghking hku galaw ai n-gang pipe hpe hpaw ai gaw, "rolling + welding" galaw ai lam hpe madung tawn ai-a n-gang n-gang gaw, katsi ai{2}} n-gun rawng ai (sh) katsi ai{3}}roll hpe tubular blank langai mi de madung tawn nna, dai hpang, matut manoi pipe hkum hkrang hpe hpaw na matu, weld (sh) submered{4}}}arc weld galaw ai. Anti{6}}}corrosion hpaji gaw ndai npawt nhpang hpe gawgap nna, ntsa lam hpe tsi lajang ai, shingnip shingna, shing nrai, n-gup magap hpe n-gun n rawng ai hku nna, n-gun n-gun hpe ninghkap lu ai atsam hpe jat ya ai.
II. Core hkrang shapraw ai lahkam ni hpe hkrak tup sang lang dan ai
1. Pipe hpe shawng nnan tau hkrau lajang da ai: San seng ai hte hkrang shapraw ai
Anti{0}}corrosion layer lapran na matut mahkai lam n-gun gaw, npawt nhpang pipe ntsa na san seng ai lam hte n-gun n rawng ai lam ni hta hkrak sha madung tawn ai. Residual sau, n-gun, n-gun n-gun n-gun n-gun hta naw ngam nga yang, anti{2}}corrosion material gaw n-gun n rawng ai sha n-gun n rawng mat nna, hpang na manghkang ni rai nga ai, n-gun n rawng ai hte n-gun yawm mat ai zawn re ai manghkang ni hpe byin shangun ai. Dai majaw, shawng nnan tsi lajang ai lam gaw, hpaw shabawn ai lam hta shawng nnan na ahkyak ai lahkam rai nga ai.
Laksan bungli galaw ai lam ni hta:
Mechanical n-gun hpe shaw kau ai: Shot blasting (sh) sandblasting arung arai ni gaw, n-gang pipe ntsa hpe hkra machyi na matu, n-gun ja ai{0}}speed steel shot (sh) quartz quartz hpe lang nna, scale hpe shaw kau nna, langai sha re ai n-gun rawng ai n-gun hpe shabyin ya lu ai (typically 40-100μm galu ai anchor mark sung ai shara hpe ra ai).
Chemical cleaning: Organic solutions (acetone zawn re ai) shing nrai acid{0}}}base solutions (phosphoric acid zawn re ai) ni hpe lang nna ngam nga ai sau hte kaji kajaw n-gun ni hpe shapraw kau ya ai majaw, ntsa lam hpe n mu lu ai awu asin n nga ai hpe kam mai ai.
Hka lim ai lam: N-gun ja ai nbung (sh) infrared hkyet ai lam hpe lang nna, n-gang pipe a ntsa na hka hpe grai n-gun n law ai madang de du hkra hkang lu ai.<5%) to prevent bubbles during subsequent coating.
2. Anti-corrosion layer byin pru wa ai: madung lam ni hpe shingdaw yu ai
Anti{0}}corrosion arung arai amyu myu hte jai lang ai lam hpe madung tawn nna, anti-corrosion steel pipe ni a hpaw shabawn ai lam hpe lam kaba masum hku garan mai ai:
(1) Masum ngu ai n-gun (3PE) anti{3}}}corrosion- hpe grau nna jai lang ai ladat .
3PE anti-corrosion gaw "fusion n-gun rawng ai epoxy powder (FBE) a lawu na layer + adhesive lapran na layer + polyethylene shinggan layer" a hpawng de ai hkrang masa langai mi rai nga ai. Dai gaw, epoxy powder a n-gun kaba ai n-gun hpe, polyethylene a grup yin a n-gun shayawm ai lam hpe ninghkap lu ai atsam hpe kayau kaya galaw nna, lup makoi da ai sau hte wan sau pipeline zawn re ai n hkru n kaja ai makau grup yin ni a matu mung htuk manu nga ai. Molding galaw ai lam gaw lawu na hte maren rai nga ai:
Base coating: Electrostatically hku nna, n-gun rawng ai epoxy powder (150 μm hta jan ai (sh) maren sha) hpe garan nna, pre{1}}}} n-gang n-gang ntsa de maren sha garan nna, 200-230℃galu ai katsi ai shara hta hka lim mat nna, 50-100 μm daram galu ai epoxy layer hpe hpaw na matu, n-gun ja ai nbung katsi ai shara hta n-gun dat dat u;
Intermediate layer coating: Adhesive (ga shadawn, galai shai ai polyethyle copolymer zawn re ai ni) hpe gaw, n-gup magap langai mi hku nna, molten state (250℃daram ) de katsi shangun nna, dai hpang, 170-250 μm daram galu ai, n-gup magap langai hku nna, epoxy layer a shinggan maga de, maren mara shinggrup da ai;
Shinggan maga na nsam: High{0}density polyethylene (HDPE) hpe mung, extruder hku nna hka lim kau nna, shinggan makawp maga ai layer hpe 1.8-3.7 mm galu ai (ultraviolet rays hte jak hte hkra machyi ai lam ni hpe ninghkap lu ai).
(2) Epoxy coal tar hpe ninghkap ai - kaji kaba hte htuk manu ai diameter kaji ai pipeline ni a matu htuk manu ai
Ndai ladat gaw epoxy resin hte nhprang wan n-ga n-gun hpe madung hku nna lang nna, n-gang pipe a ntsa e anti{0}} seng a layer hpe hpaw nna, hka shin ai (sh) dip nna galaw ai. Shi a arawn alai ni gaw manu n law ai, raitim, gawgap ai makau grup yin a nbung katsi ai lam (5℃hta grau ra ai ) hte hka lim ai lam hpe hkam sha chye ai, hka garan ai hte hka lim ai pipe ni (sh) aten kadun bungli masing ni a matu law law lang lang ai.
(3) Cement n-gun n-gun - gaw laksan masa ni a matu jat bang ai hparan ladat langai mi
N-gun n law ai- pressure pipeline ni a matu, n-gun n-gun hpe htaw sa ai n-gun n-gun hpe htaw sa ai media (lu lu hka zawn re ai), centrifugal hka garan ai ladat hpe lang nna, cement mortar (hka{2}pcement ratio 0.4{6}0.5) hpe steel pipe a kata bunghku de maren mara hkan nang nna, 10-30mm galu ai lining layer hpe hpaw na matu jai lang mai ai. Ndai lam gaw manu n law ai hte n-gun n rawng ai raitim, chemical n-gun yawm ai hpe n-gun n rawng ai.
3. Post{1}} Hkrang hte chyam dinglik ai lam: Quality hpe n-gun jaw ai lam
Hpaw hpang ai hpang, anti{0}}corsion coating hpe grai sawng ai hku hkang lu ai:
Thickness Testing: Magnetic (sh) ultrasonic n-gun shadawn shadang hpe lang nna, layer langai hte langai a galu kaba ai lam hpe shadawn yu u (ga shadawn, 3PE anti{3}}corrosion coating hpe lang nna, epoxy layer gaw 80μm hta grau kaba ai (sh) dai hte maren rai ra ai, polyethylene layer gaw 2mm hta grau kaba ai (sh) maren sha rai ra ai).
Adhesion Testing: Anti{0}}corrosion coating hte cross{1}}hatch hpe lang nna, n-gang pipe lapran na matut mahkai lam hpe jep yu u (5MPa hta grau kaba ai (sh) dai hte maren sha ra ai).
Electric Spark hpe sawk sagawn ai lam: Anti{1}}}corrosion hpe shinggrup da ai, n-gun kaba ai-} hkum hkrang hpe shinggrup nna, pinholes (sh) hkra machyi ai lam hpe chye na lu na matu, tsaw ai{1}}}voltage probe (leak point voltage 25kV hta grau nna (sh) dai hte maren sha re).
Hkrang shapraw ai lam jep sagawn ai lam: Bubble, crack, hte sags zawn re ai n kaja ai lam ni n nga ai hpe jep yu nna, n-gun n rawng ai hte n-gun rawng ai hpe pyi hkam kaja hkra galaw u.
III. Process hpaji ningnan hte htawm hpang na Trends ni
Industrial ra kadawn ai lam ni grau grau law wa ai hte maren, n-gun n-gun n-gun n-gun n-gun n-gun n-gun yawm wa ai n-gang pipe ni a matu hpaw shabawn ai lam gaw, grau tsaw ai bungli galaw lu ai atsam, hpaji rawng ai hpaji masa, grup yin hpe makawp maga ai lam de rawt jat wa nga ai:
Prefabrication hpe n-gun jaw ai lam: Matut manoi galaw shapraw ai lam ni gaw "steel pipe hpe shinggrup ai, tau hkrau tsi lajang ai, hte anti{0}}corrosion coating" hpe shingdaw nna, galaw shapraw ai lam ni hpe kadun hkra galaw ya nna, n-gun rawng ai lam hpe grau kaja hkra galaw ya ai;
Anti{0}}corrosion arung arai nnan ni hpe gyin shalat ai lam: Nano{1}} hpe galai shai kau ai epoxy powder hte graphene-enhancethene zawn re ai jai lang ai lam ni gaw, n-gun n rawng ai prat hpe grau nna jat ya ai (50 ning jan);
Hpun nsam hpraw ai ladat ni hpe sawk sagawn ai lam: Organic solvent ni hpe jai lang ai lam hpe bai gram lajang ai (ga shadawn, htunghking hku nna hka n-gun-}based coatings ni hpe galai shai ai gaw, VOC dat dat ai lam hpe shayawm ya ai.
Daw dan lam
Corrosion- hpe ninghkap lu ai n-gang pipe ni a matu hpaw shabawn ai lam gaw, arung arai hpaji, jak rung galaw ai lam, chemical engineering ni a lapran na garan ginhka ai lam a jahtum rai nga ai. Base pipe hpe tau hkrau tsi lajang ai kaw nna, anti-corrosion coating hpe hkrak hkrak jai lang ai du hkra, lahkam shagu hta parameters hte details ni hpe grai sawng ai hku hkang ra ai. Matut manoi hpaji masa rawt jat wa ai hte, htawm hpang na n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun hpe ninghkap lu ai atsam hpe n-gun n-rawng ai lam hpe n-gun n-rawng ai lam hpe ninghkap lu ai madung ra kadawn ai lam hpe n-gun jaw ai sha n-ga, hpaji rawng ai hku yu reng ai lam hta mung, n-gun n-rawng ai lam ni hpe mung lu la na re.
