http___www.wt-steelpipe.com_ga_news_an-introduction-of-production_1.xml
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A steel pipe is a cylindrical tube made from steel and is the most utilized product in the steel industry. The primary use of steel pipes is in the transport of products—including oil, gas, and water over long distances. Common household appliances such as fridges use steel pipes, as well as heating and plumbing systems. Steel pipes come in a variety of sizes and can also be used for structural requirements like hand rails and pipe bollards. Steel pipe is produced in one of two methods, which result in either seamless or welded products. Seamless pipe is made from solid round stock that is first heated, then extruded—pushed or pulled over a die, resulting in a hollow tube. This process gives the seamless pipe a smooth and even surface finish, without any visible joints. Welded pipe is manufactured from steel sheets that are rolled, then welded longitudinally along the rolled joints. This results in a product that has a welded joint throughout. Welded pipe is less expensive than extruded, seamless pipe, but will not exhibit the same physical property characteristics, and is used mainly for low pressure applications or low-load requirements. How are steel pipes made? Raw steel is produced by melting raw materials in a furnace and controlling the composition through the addition of alloys and removal of impurities. Molten steel is poured into molds to make ingots, or transferred to a continuous casting machine to make plate, billets, and blooms. This raw steel must be converted to a form that can be rolled into pipes of specific dimensions or stretched into hollow tubes. Welded Pipe Skelp is unwound from the spool, heated, and rolled through grooved rollers, which bend the edges of the skelp upwards. This process produces a cylindrical tube where the two edges have been bent right around to meet each other forming a long cylinder. One of three welding processes are then used to join the edges together and seal the pipe. Continuous welding In a continuous welding operation, welding rollers press the edges of the pipe into each other—forming a forged weld due to the heat that has already been applied to the skelp. No metal is added during welding, and the final rollers reduce the diameter and wall thickness of the pipe to the specifications. Electric resistance welding Electric resistance welding follows a similar process to continuous welding, except that the skelp is cold rolled into the pipe shape. Current is supplied to the pipe edges by revolving copper disks, which heat the edges up to the weld temperature. Welding rollers join the pipe edges to create the forged weld. Spiral welding Spiral welding and double submerged arc welding use more conventional welding techniques and the addition of weld material to form the bond. Seamless Pipe Seamless pipes are produced without the need for welding. They are created by heating and stretching a solid steel billet, before piercing it to form the hollow center. Billets are heated to extreme temperatures making them white hot and then rolled under high pressure causing the billet to stretch out. A bullet shaped piercer is used to make the hollow center regular according to its dimensions. A series of milling operations follow to conform the pipe to the required specifications. Finishing steps Pipes may be put through a straightening machine as a final process step before being fitted with joints at the end. Small bore piping is usually fitted with threaded joints, but larger bore piping is normally fitted with flanges which are welded onto the end of the pipe. Measuring machines check the dimensions of the finished pipe, and stamp the details on the side of the pipe for quality control purposes. Post time: Apr-09-2018
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Is phíobáin déanta as cruach feadán sorcóireach déanta as cruach agus is é an táirge is mó a úsáidtear sa tionscal cruach. Is é an úsáid príomhúil píobáin déanta as cruach sa iompar táirgí-áirítear ola, gás, agus uisce thar achair fhada. fearais tí coitianta ar nós cuisneoirí úsáid píobáin déanta as cruach, chomh maith le córais téimh agus pluiméireachta. píobáin déanta as cruach teacht i réimse de mhéideanna agus is féidir a úsáid freisin chun ceanglais struchtúracha nós ráillí láimhe agus mullaird píopa. Tá píopa déanta as cruach a tháirgtear i gceann amháin de dhá mhodh, mar thoradh air i gceachtar táirgí gan uaim nó táthaithe. Tá píopa gan uaim déanta as stoic soladach bhabhta go bhfuil an chéad téite, ansin easbhrúite-bhrú nó a tharraing thar dísle, a eascraíonn i bhfeadán log. Tugann an próiseas an píopa gan uaim chríochnú go réidh agus fiú dromchla, gan aon joints infheicthe. Tá píopa Táite rinneadh as leatháin cruach atá rollta, táthaithe ansin longitudinally feadh na joints rollta. thoradh air seo i táirge a bhfuil comh táthaithe ar fud. Is píopa Táite níos saoire ná easbhrúite, píopa gan uaim, ach ní bheidh taispeáint na saintréithe maoine céanna fisiciúil, agus tá sé a úsáidtear go príomha le haghaidh iarratas brú íseal nó ceanglais íseal-ualach. Cén chaoi a bhfuil píobáin déanta as cruach a dhéantar? Tá cruach amh a tháirgtear trí leá amhábhair i foirnéise agus a rialú comhdhéanamh trí an Chomh maith cóimhiotail agus a bhaint neamhíonachtaí. Tá cruach leáite poured isteach múnlaí a dtinní dhéanamh, nó a aistriú chuig meaisín réitigh leanúnach a dhéanamh pláta, billéid, agus blooms. Ní mór an chruach amh a thiontú go foirm féidir iad a rolladh isteach i píopaí de toisí sonracha nó sínte i feadáin log. Táite Píob Skelp é d'fhoirceann as an spól, téite, agus rolladh trí rollóirí eitrithe, a Bend an imill an skelp in airde. Táirgeann an próiseas feadán sorcóireach ina bhfuil an dá imill a bheith Bent ceart timpeall chun freastal ar a chéile a bheidh ina sorcóir fada. Ceann de trí phróiseas táthú a úsáid ansin a bheith ar an imill le chéile agus séala an bpíopa. táthú 1.Continuous In oibríocht táthú leanúnach, rollóirí táthú brúigh an imill an píopa i ngach ceann eile-a bheidh ina weld brionnaithe mar gheall ar an teas a cuireadh i bhfeidhm cheana ar an skelp. Níl aon mhiotal leis i rith táthú, agus na rollóirí deiridh a laghdú an trastomhas agus balla tiús an píopa leis na sonraíochtaí. friotaíocht 2.Electric táthú leanas friotaíocht leictreach táthú próiseas cosúil leis táthú leanúnach, ach amháin go bhfuil an t-skelp fuar-rollta i gcruth phíopa. Atá ann faoi láthair ina soláthrófar don imill píopa trí roithleánach dioscaí copair, a teas an imill suas go dtí an teocht weld. rollóirí Welding bheith ar an imill píopa a chruthú ar an weld brionnaithe. táthú 3.Spiral táthú Bíseach agus dúbailte submerged úsáid táthú stua teicnící táthú níos traidisiúnta agus trí ábhar weld chun an banna. Píob gan uaim Píopaí gan uaim a tháirgtear gan gá le táthú. Tá siad a cruthaíodh trí théamh agus síneadh a billet cruach soladach, sula piercing é chun an t-ionad log. Bhilléid a théamh chuig teocht an-mhór a dhéanamh orthu bán te agus ansin rolladh faoi bhrú ard is cúis leis an billet a stráice amach. Tá bullet múnlaithe piercer a úsáideadh chun an t-ionad log de réir rialta leis a ghnéithe. Sraith na n-oibríochtaí muilleoireacht a leanúint chun cloí leis an bpíopa leis na sonraíochtaí is gá. céimeanna Críochnú Is féidir Pipes a chur trí mheaisín straightening mar chéim bpróiseas deiridh sula feistiú le hailt ag an deireadh. Tá piping rug Beaga feistithe de ghnáth le hailt snáithithe, ach tá piping rug níos mó socraithe mar is iondúil le flanges a táthaithe ar an deireadh an phíopa. meaisíní tomhais seiceáil na toisí an píopa críochnaithe, agus stampa na sonraí ar an taobh an phíobáin chun críche rialaithe cáilíochta. Post ama: Apr-09-2018