PVC pipe, dai ni na aten na gawgap ai lam hte engineering hta law law lang lang ai plastic piping arung arai ni gaw, hka hte hka lim ai lam, wan n-gun, hkai lu hkai sha ai lam, hkai lu hkai sha ai lam ni lawm ai, hkai sun amyu myu hta ra sharawng dik ai lata la ai lam tai wa sai, dai gaw grai kaja ai bungli galaw ai lam hte manu n law ai majaw re. Shaning law law tatut yu maram ai lam hte hpaji masa sawk sagawn ai lam ni ngut ai hpang, laika ka ai wa gaw PVC pipe lata ai lam, jung da ai lam, gram lajang ai lam ni hte seng nna ahkyak ai mahkrum madup law law hpe kadun dawk tsun dan ai, dai ni hpe lawu de hkrang shapraw ai hku nna sang lang dan ai.
I.
PVC pipe, polyvinyl chloride pipe a matu kadun ai hpe rigid PVC (UPVC) hte plasticizer n-gun hpe madung tawn nna n-gun rawng ai PVC hku garan mai ai. UPVC hpe madung hku nna, 45 MPa hte maren (sh) dai hte maren sha rai nga ai, Greater a n-gun atsam a dan dawng ai arawn alai ni a majaw, engineering practice hta madung lang ai rai nna, 45 MPa hte 60℃du hkra na 15℃kaw nna 60℃du hkra na aten galu bungli galaw ai nbung katsi ai lam hpe mu lu ai. Laksan lata ai lam hta, lawu na masa ni hpe myit maju jung na: Pipe diameter hkam sharang ai lam gaw GB/T 10002.1 hpe hkan sa ra ai, bunghku a n-gun n-gun yawm ai lam ni gaw ±10% kata kaw nga ai. pressure pipe ni a matu, hoop stiffness rating hpe jep yu ra ai (SN4/SN8/SN16 gaw lup makoi ai sung ai lam n bung ai hte bung ai). Sanitary pipe ni gaw hka shin na ahkang jaw ra ai, lead hta lawm ai lam ni gaw 0.001 mg/L hta n mai lawm ai.
Hpa majaw nga yang, n bung ai galaw shapraw ai ni galaw shapraw ai PVC pipe fittings ni a matut mahkai lam hte seng ai lam n bung ai hpe sadi ra ai. Municipal project langai hta, Brand A glue hpe Brand B socket ni hte kayau kaya galaw ai majaw 23% joint leakage byin wa ai. Ndai lam hpe dai brand langai kaw na matching materials ni hpe lang ai hpe madang masat da ai hku nna hparan ai. Supplier ni gaw, hkum tsup ai arung arai masat masa laika ni hpe jaw na matu hte, mari ai shaloi, sample hkam la ai lam ni hpe galaw na matu hpaji jaw da ai.
II. Madung gawgap ai lam hte hpawng de ai ladat ni
Pipe ni hpe ap nawng da ai PVC saw (sh) angle grinder lang nna cut galaw ra ai. Dai cut ni gaw n-gun n rawng ai hte burr-lawt ra ai. Degree 2 jan ai inclination angle gaw, n-gup hta n-gun n-gun hpe shabyin ya lu ai. Hot{5}}melt matut mahkai ai lam hta, katsi ai shara (200{11}220℃) hte aten ladaw (Φ50 pipe a matu 4{12}}5 seconds daram) hpe grai hkang zing ra ai. Grai law hkra katsi ai gaw, arung arai ni hpe jahten kau ya nna, hydrogen chloride gas hpe shapraw ya lu ai. Socket-and-spigot matut mahkai lam ni a matu, socket end myi hte bang da ai depth mark hpe n-gun jaw ra ai. Teng sha gawgap ai shaloi, 15% daram gaw hka lim ai lam n law ai majaw byin pru wa ai.
Ga npu hpe jung na matu, tara ni gaw, shingdu n-gun n-gun gaw pipe diameter 1/3 hta jan n mai ra ai, 150mm galu ai n-gun rawng ai layer hta, hkrat sum mat ai lung seng ni zawn re ai n-gun ja ai arai ni n lawm ra ai. Nta kaw na marang hka pipe network masing langai hta, n law htum backfill compaction n law ai majaw, n bung ai hku nga ai masha jahpan gaw 3% jan ai. Hpang e, n-gun jat na matu concrete piers ni hpe jat bang ai. Hpa majaw nga yang, n-gun rawng ai pipe madi shadaw ai lam ni a matu, spacing gaw DN25-DN50 pipe ni a matu 1.5m vertical hku nna 1.5m hta grau ai (sh) n-gun n law ai shara hta n-gun n rawng ai (sh) maren sha rai ra ai. Anchor point ni hpe bend ni hta jat bang ra ai.
III. Manghkang hparan ai lam hte gram lajang ai lam ni
PVC pipe hkrat sum ai lam ni gaw, n-gun n-gun n-gun n-gun n-gun, pipe bunghku htum mat ai, hka lwi ai nsen ni lawm ai. Salt ni hta leak ni hpe PVC patching adhesive hte aten kadun laman pat da mai ai, raitim, prat tup gram lajang na matu gaw, n-gun n rawng ai hte bai matut mahkai ra ai. Pipe cracking gaw katsi ai katsi majan aten hta law law lang byin chye ai. Ambient nbung laru ni gaw 5℃npu de hkrat wa ai shaloi, insulation masat masa ni hpe hkan sa ra ai (sh) katsi ai- hpe ninghkap lu ai PVC pipe ( -20℃hta n-gun n law ai (sh) dai hte maren) lang ra ai. Hka lwi ai nsen hpe, hka lim ai arung arai ni hpe bang nna (rubber gasket zawn re ai) shing nrai, hka lwi ai lam hpe gram lajang ai hku nna hparan mai ai (0.8-1.5 m/s hpe n-gun jaw na matu hpaji jaw ai).
Aten tup gram lajang ai lam hpe jep joi ai lam ni hta: n-gun n rawng ai hte n-gun n rawng ai lam ni hpe pipe ntsa hpe myi hte mu lu ai hku jep joi ai lam; makoi da ai hka lwi ai lam ni hpe mu lu na matu leak detector hpe lang ai; hte masum ning shagu lup makoi da ai pipe ni hta anti{0}}corrosion a n-gun hpe chyam dinglik ai. Industrial park langai mi hta case study langai hta, digital pipeline hparan ai ladat hpe jai lang ai shaloi, PVC pipe hkrat sum ai lam ni hpe mahtai jaw ai aten hpe 60% shayawm ya nna, gram lajang ai manu hpe 42% shayawm ya ai hpe mu lu ai.
IV. Rawt jat galu kaba lam hte hpaji ningnan ni hpe jai lang ai lam
Modified PVC pipe nnan ni gaw shanhte a jai lang ai lamu ga jarit ni hpe matut manoi jat wa nga ai: PVC-M pipe ni gaw shanhte a hkra machyi ai lam hpe ninghkap lu ai atsam 300% jat wa ai hpe mu lu ai; PVC-O pipe ni gaw shanhte a hoop n-gun hpe manga lang jan jat wa ai hpe mu lu ai; hte nanocomposites ni hpe hpaw hpang ai gaw, 99% antibacterial rate hpe lu la na matu, antibacterial PVC pipe ni hpe galaw ya lu ai. Smart city gawgap ai hta, hpaji rawng ai PVC pipe network system ni hte hpawng de da ai n-gun sensor ni gaw 0.5 metres npu na shut ai lam hte hkrak tup ai hka lim ai shara hpe lu la sai.
Engineering sut masa hku yu yang, PVC pipe ni hta shawng nnan na gumhpraw bang ai lam gaw, cast iron pipe ni hta 35% daram yawm ai raitim, shanhte a 50{3}} shaning na prat tup manu jahpu yawng gaw grau akyu rawng ai. Ngai a mungdan a "plastics ni hpe galai shai ai n-gang" masa matut nna rawt jat wa ai hte maren, madang masat da ai PVC pipe application hpaji masa gaw, npawt nhpang gawgap lam gawgap ai lam hpe tsaw dik htum rawt jat galu kaba wa na matu ahkyak ai madi shadaw lam langai byin wa na re.
