DIN 30670-1ndeye matatu-layer extrusion process inogadzira polyethylene (3LPE) kupfekedza pamusoro pe longitudinally kana spirally welded uyemapaipi esimbi asina musonokuvadzivirira kubva pakuora.
Inonyanya kushandiswa mukuvigwa kana kunyudzwa kwepombi masisitimu ekutakura zvinwiwa kana magasi.
Ongorora: DIN 30670 yakakamurwa kuita zvikamu zviviri mune yazvino 2024 edition zvinoenderana nemagadzirirwo ekugadzira, anoti DIN 30670-1 inovhara hose uye ronda rakawedzera polyethylene coatings, uye DIN 30670-2 inovhara sintered uye murazvo wakapfapfaidza marudzi.
Izvo zvakakamurwa kuva marudzi maviri maererano nekugadzirwa kwekushisa, izvomhando N uye nyora S.
| Type | Dhizaini tembiricha (°C) |
| N | -20 kusvika +60 |
| S | -40 kusvika +80 |
uyeISO 21809-1inoenderana nekirasi A uye kirasi B, zvichiteerana.
1st layer Epoxy resin layer, epoxy resin poda inofanira kushandiswa.
2nd Adhesive layer, inogona kuve yehupfu kana yakawedzera yakavharwa.
3rd layer Polyethylene layer, chubhu extrusion process, kana mamhepo extrusion process.
Tube Extrusion:
Mukuita uku, iyo polyethylene zvinhu inoburitswa yakananga mune inoenderera tubular fomu, iyo inozoiswa paipi yesimbi.
Iyi nzira inowanzo shandiswa kune madiki mapaipi edhayamita uye inovimbisa kufanana uye kuenderera kwekupfeka.
Mhepo extrusion:
Mukuita uku, iyo polyethylene inobudiswa muchimiro chetambo uye yobva yakuvadzwa pamusoro pepombi yesimbi.
Iyi nzira inokodzera mapaipi makuru-diameter kana asina-standard-saizi uye inobvumira mamwe machira anochinjika pamapombi akaoma kana makuru.
Zvichienderana nezvinodiwa zvepurojekiti, imwezve dhizaini yekudzivirira yemechini inogona kuwedzerwa ku3LPE.
Zvinowanzoshandiswa zvinhu zvinosanganisirakongiri(ona ISO 21809-5),girazi fiber-reinforced plastiki, kana simende dhaka(ona DN N 30340-1).
Kuti uve nechokwadi chekuveura kwakanaka kwesimba, zvinodikanwa kuita rough kana kudzvanya pamusoro pe polyethylene.
Kurapa kwakadaro kunobatsira kuwedzera kusungirirwa pakati pekuwedzera kwekudzivirira kwekudzivirira uye polyethylene coating.
Epoxy Resin Layer Ukobvu
Minimum 80um.
Adhesive Layer Ukobvu
Minimum 150um.
Total Coating Ukobvu
Zvichienderana nedhayamita yezita repombi yesimbi, hupamhi hwehuputi hwekudzivirira huchave hwakasiyana.
Pakukora kwese kweiyo 3LPE layer, DIN 30670-1 inokamura makirasi matatu kutarisana nezvinodiwa zvakasiyana zvekuvaka.n,v,uye s.
Giredhi n: Pamamiriro akajairika, ukobvu hwegiredhi n hunowanzo kukwana.
Pakupfekedza kwepolyethylene, hupamhi hwe 1 mm hunoshandiswa kunyanya kudzivirira kuparara, asi iyo yakasara yakasara inoshandiswa kusimudzira mechanical load-kutakura simba rekudzivirira.
Giredhi v: Kana iyo mechanical load inowedzera (kutakura, kuchengetedza, kuisa, unhu hwakananga, kuwedzera kwezvinodiwa), iyo shoma yekuputira ukobvu inofanira kuwedzerwa ne 0.7 mm, kureva v = n + 0.7 mm.
Grade s: Hukobvu hwekupfekedza hurefu hwakakwira kupfuura v hunogonawo kuwiriranwa kuti huzadzise zvinodiwa nepurojekiti chaiyo, uye makubvu akadaro akajairwa akanyorwa kuti Grade s.
150mm ± 20mm, iyo bevel angle yekukoira ukobvu haifanirwe kunge inopfuura 30 °.
Iyo epoxy uye inonamira layers ichabviswa kanenge 80 mm kubva kumagumo epombi.Iyo epoxy layer ichasiiwa ichibudikira kubva ku polyethylene-yakavharwa pombi kumagumo isingasviki 10 mm.
Kuti uone kureba, kuyera kubva pamudzi wepombi kusvika pakutanga kweiyo diagonal yakachekwa kupera kweiyo corrosion protection layer.
General Defects
Kusakwana kudiki uye kukanganisa pamusoro pesimbi isina kusvika.
Makomba ari kumusoro kwePE;
Nzvimbo diki dzine kufukidzwa kusina kukwana;
Inclusions uye mabhubhu emhepo muchikamu chepamusoro;
Kunamatira kwezvinhu zvekunze;
Surface abrasion;
Madhindi madiki mukupfeka.
Izvi zvinokuvadza zviduku zvinobvumirwa kugadziriswa uye hapana muganhu kune nzvimbo inogona kugadziriswa.
Marema Akakomba
Coating kukanganisa kwakananga kumusoro kwepombi yesimbi.
Nzvimbo yehurema hwemunhu hunofanirwa kugadziriswa haifanire kudarika 10 cm².Nhamba inobvumirwa yehurema hunogadziriswa ndeye 1 kukanganisa pa 1 mita yehurefu hwepombi.Kana zvisina kudaro, pombi inofanira kunyorwa.
ISO 21809-1: Kunyanya kune ekunze matatu-layer extruded polyethylene uye polypropylene (3LPE uye 3LPP) machira emapombi esimbi anoshandiswa mukufambisa masisitimu muindasitiri yemafuta negesi.
CSA Z245.21: Inotsanangura ekunze polyethylene anticorrosion coatings yesimbi pombi inoshandiswa mu conveyor systems.
AWWA C215: External polyethylene anti-corrosion coatings yakakodzera pombi dzemvura.Kunyangwe ichinyanya kushandiswa kufambiswa kwemvura masisitimu, ine zvakawanda zvakafanana neDIN 30670 maererano nemidziyo uye tekinoroji yekushandisa.
Isu tiri kutarisira kushanda pamwe newe kuti tipe yakanakisa mhando yesimbi pombi uye anti-corrosion coating mhinduro kumapurojekiti ako.Ndapota inzwa wakasununguka kutibata nesu kuti uwane rumwe ruzivo rwechigadzirwa, isu tinofara kukubatsira iwe kuwana yakanakisa simbi pombi sarudzo pane zvaunoda!
