Spiral Welded Steel Pipe For Underground Natural Gas Pipe
suma:
Mapaipi epasi pegasi echisikigo anoita basa rakakosha mukuunza iyi yakakosha sosi kudzimba, mabhizinesi nemaindasitiri.Kuti ive nechokwadi chekuchengetedza uye kushanda zvakanaka kweaya mapaipi, zvakakosha kushandisa zvakaringana zvinhu uye welding maitiro panguva yekuvaka.Isu tichaongorora kukosha kwe spiral welded simbi pombi uye kukosha kwekutevera kwakakodzera pombi welding maitiro kana uchishanda nepasi pevhu gasi pombi.
Spiral welded pipe:
Spiral welded pombi yakakurumbira mukuvaka kwepasi pevhu gasi pombi nekuda kwesimba rayo uye kusimba.Mapombi aya anogadzirwa nekupeta simbi inotendereka kuita denderedzwa yobva yaipinza pamwe chete nemisono.Mhedzisiro yacho mapaipi ane majoini akasimba, akavharwa anogona kumirisana nekumanikidza kwekunze uye kuenderana nekufamba kwepasi.Ichi chimiro chakasiyana chinoitaspiral welded simbi pombiyakanakira mapaipi epasi pevhu apo kugadzikana kwakakosha.
Mechanical Property
| Giredhi A | Giredhi B | Grade C | Grade D | Giredhi E | |
| Goho simba, min, Mpa(KSI) | 330(48) | 415(60) | 415(60) | 415(60) | 445(66) |
| Kusimba simba, min, Mpa (KSI) | 205(30) | 240(35) | 290(42) | 315(46) | 360(52) |
Kuumbwa Kwemakemikari
| Element | Kuumbwa, Max,% | ||||
| Giredhi A | Giredhi B | Grade C | Grade D | Giredhi E | |
| Carbon | 0.25 | 0.26 | 0.28 | 0.30 | 0.30 |
| Manganese | 1.00 | 1.00 | 1.20 | 1.30 | 1.40 |
| Phosphorus | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 |
| Sulfur | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 |
Hydrostatic Test
Hurefu hwega hwega hwepombi huchaedzwa nemugadziri kune hydrostatic pressure iyo inoburitsa mumadziro epombi kushushikana kusingasviki 60% yeiyo yakataurwa kushomeka kwegoho pakupisa kwekamuri.Kudzvanywa kunozotemwa neinotevera equation:
P=2St/D
Kusiyana Kunobvumirwa Muhuremu uye Zviyero
Hurefu hwega hwega hwepombi huchayerwa hwakasiyana uye huremu hwayo hahuzosiyane kupfuura 10% pamusoro kana 5.5% pasi pehuremu hwayo hwekufungidzira, huchiverengerwa uchishandisa kureba kwayo uye uremu hwayo pahurefu hweyuniti.
Iyo dhayamita yekunze haifanire kusiyana kupfuura ± 1% kubva kune yakatsanangurwa yekunze dhayamita.
Ukobvu hwemadziro chero nguva haufanire kupfuura 12.5% pasi peiyo yakataurwa madziro ukobvu.
Urefu
Single random urefu: 16 kusvika 25ft (4.88 kusvika 7.62m)
Hurefu hwakapetwa kaviri: pamusoro pe25ft kusvika 35ft (7.62 kusvika 10.67m)
Hurefu hwakafanana: musiyano unobvumidzwa ±1in
Ends
Mirwi yepombi inofanira kuiswa pachena, uye maburi ari kumigumo anofanira kubviswa.
Kana iyo pombi inopera yakatsanangurwa kuve bevel inopera, kona ichave 30 kusvika 35 degree
Pipe welding maitiro:
Zvakakodzerapombi welding maitirozvakakosha pakusimba uye kuchengetedzeka kwemapaipi epasi pevhu gasi chaiwo.Heano mamwe mashoma akakosha ekutarisa:
1. Welder qualifications:Vanokwanisa uye vane ruzivo welders vanofanirwa kuhaiwa, vachiona kuti vane zvitupa zvinodikanwa uye hunyanzvi hwekubata chaiwo maitirwo emagetsi anodiwa pamapombi egasi chaiwo.Izvi zvinobatsira kuderedza njodzi yekuremara kwewelding uye inogona kubuda.
2. Kugadzirira pamwe chete uye kuchenesa:Kugadzirira kwemajoini kwakakodzera kunokosha musati mave welding.Izvi zvinosanganisira kubvisa chero tsvina, marara kana zvinosvibisa zvinogona kukanganisa kuvimbika kweweld.Pamusoro pezvo, kuvevedzera mapaipi epombi kunobatsira kugadzira mubatanidzwa wakasimba wakasungwa.
3. Welding matekiniki uye parameters:Hurukuro hwekugadzira matekiniki uye maparamita anofanirwa kuteverwa kuti uwane emhando yepamusoro welds.Iyo welding process inofanirwa kufunga nezvezvinhu zvakaita sepombi ukobvu, welding chinzvimbo, gasi kuumbwa, etc. Zvinokurudzirwa kushandisa otomatiki welding maitirwo akadai segasi simbi arc welding (GMAW) kana submerged arc welding (SAW) kuve nechokwadi chemhedzisiro uye kuderedza vanhu. kukanganisa.
4. Kuongorora uye Kuedzwa:Kunyatsoongorora uye kuyedzwa kwe weld kwakakosha kuratidza kunaka kwayo uye kuvimbika.Matekinoroji akadai seasina-kuparadza kuyedza (NDT), anosanganisira X-ray kana ultrasonic test, anogona kuona chero hurema hunogona kukanganisa kuvimbika kwenguva refu kwepombi.
Mukupedzisa:
Kuvaka mapaipi epasi pegasi echisikigo uchishandisa spiral welded simbi pombi inoda kuteedzera kwakaringana pombi welding maitiro.Nekuhaya mawelder ane hunyanzvi, kunyatsogadzirira majoini, kutevedzera nzira dzakanangana dzekukwirisa, uye kunyatsoongorora, tinogona kuve nechokwadi chekuchengetedza, kusimba, uye kugona kwepombi idzi.Kuburikidza nekunyatsotarisisa kune zvakadzama mukuita welding, tinogona kuendesa gasi rechisikigo nechivimbo kuti rizadzise zvinodikanwa zvesimba renharaunda dzedu tichikoshesa kugara zvakanaka kwezvakatipoteredza uye kuchengetedzwa kweveruzhinji.
