I-ASTM A234insimbi ejwayelekileukufakwa kwepayipiasetshenziswe kabanzi ezinhlelweni zamapayipi, kufaka phakathi i-carbon steel kanye ne-alloy steel material.

Kuyini ukufakwa kwepayipi lensimbi?
Ukufakwa kwamapayipi ensimbi kwenziwa nge-carbon steel noma ipayipi lensimbi ye-alloy, amapuleti, amaphrofayili, ukuze abe nesimo esithile esingenza umsebenzi (Shintsha indlela yoketshezi noma isilinganiso) ezinhlelweni zamapayipi. Ikakhulukazi lokhu kufakwa kuhlanganisa indololwane yensimbi (45 noma 90 degree bend), tee, reducer (concentric or eccentric reducer), cross, caps, ingono, flanges, gasket, studs nokunye.

Ngezinhloso zezimboni, ezinhlelweni zamapayipi ngokuvamile sidinga ukushintsha indlela yokudlulisela; Lungisa uketshezi (uwoyela negesi, amanzi, udaka) izinga lokugeleza; Vula noma vala amapayipi, njll. Ngakho-ke ukuze uqedele le misebenzi, kuzosetshenziswa ukufakwa kwamapayipi ensimbi.

Iyini i-ASTM A234 WPB?
I-ASTM A234 Ukucaciswa Okujwayelekile kokufakwa kwamapayipi ensimbi kuhlanganisa insimbi ye-carbon steel kanye nensimbi ye-alloy kumasevisi okushisa aphakathi nendawo naphezulu. Ihlanganisa ukufakwa kwensimbi kwezinhlobo ezingenamthungo nezishiselwe. Ukufakwa kwepayipi lensimbi kusetshenziswa kumapayipi okucindezela kanye nokwakhiwa kwemikhumbi yokucindezela. Lezi zinto zokufakwayo zihlanganisa insimbi ebulewe, ama-forging, imigoqo, amapuleti, imikhiqizo yamapayipi engenamthungo noma i-HFW (i-fusion welded), ene-filler metal.

I-ASTM A234 ifaka insimbi ekhabhoni ekhabhoni kanye nokufakwa kwensimbi yengxubevange yokwakhiwa okungenamthungo nokushiselwe okumbozwe ukubuyekezwa kwakamuva kwe-ASTM B16.9, B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, kanye ne-MSS -SP-97. njll.

Njengoba sazi, ukufakwa kwamapayipi ensimbi e-ASTM A234 kusetshenziswa ekufakweni kwamapayipi okucindezelwa nasekwakhiweni komkhumbi ocindezelayo, ngezinsizakalo ezisemazingeni okushisa aphakathi nendawo naphezulu. Izinto zokufakwa kuleli zinga zihlanganisa insimbi ebulewe, ama-forging, amabha, amapuleti, imikhiqizo ye-tubula engenamthungo noma ehlanganisiwe ene-filler metal.
Kuleli zinga lihlanganisa ukucaciswa kwezindololwane, ama-tee, izinciphisi, amakepisi kanye nesiphambano, ngokuvamile lithatha iziphetho zokushisela izinqe.

Ubukhulu bokufakwa kwepayipi lensimbi le-ASTM A234
Amazinga: ANSI /ASME B16.9, B16.28, MSS-SP-43.
Ibanga Lobubanzi Bangaphandle: 1/2” ukuya ku-48”
Ibanga Lokuqina: SCH 10, sch 20, SCH 40, SCH STD, SCH 80, SCH XS, SCH 160, SCH XXS njll.
Izinhlobo zokukhiqiza zamapayipi ensimbi ngefojiwe, intambo, i-butt weld, futhi engenamthungo.

Amabanga ku-ASTM A234:

Ukucaciswa kwe-ASTM A234 kunamabanga amaningi, njengeWPB, WPC, WP5, WP9 WP11, WP12, WP22, WP91 njalonjalo.
Kulawa maBanga ajwayelekile i-WPB iyinto esetshenziswa kakhulu kumapayipi okushisa aphakathi nendawo naphezulu. U-W usho ukuthi uyashisela, u-P usho ingcindezi, u-B uyibanga b, ubhekise emandleni esivuno esincane.
Umthombo wezinto ezingavuthiwe zokufakwa kwepayipi lensimbi le-ASTM A234 WPB kungase kusuke epayipini lensimbi, elifana ne-ASTM A106 Gr.B ne-C. Futhi lisuka ku-steel plate, njenge-ASTM A285 Gr.C, ASTM A516 Gr 70, ASTM A572 njll.

I-ASTM A234 WPB ipayipi yensimbi ifaka izici zamakhemikhali nezomshini:
1) Ukufakwa kwe-WPB yeBanga okwenziwe ngamapayipi ensimbi noma amapuleti ubuningi C ngu-0.35%.
2) Ukufakwa kwe-Forging Okuqukethwe kwekhabhoni okungu-0.35% okuphezulu nokuqukethwe kwe-Silicon 0.35% umkhawulo, abukho ubuncane.
3) Ekunciphiseni ngakunye okungu-0.01 kokuqukethwe kwe-Carbon, okuqukethwe okuphezulu kwe-Manganese kukhuphuka ngo-0.06%, kuze kufike ku-1.35% omkhulu ku-Mn.
4) I-Copper, Nickel, Niobium ne-Molybdenum sum content ngeke idlule u-1.00%.
5) I-Niobium + Molybdenum akufanele idlule i-0.32%.

Izakhiwo zemishini zokufakwa kwamapayipi e-ASTM A234 WPB:
Amandla Okuqina 60,000 pis 415 Mpa
Isivuno Amandla 35,000 psi 240 Mpa
Izilinganiso Zokucindezela: 150LBS, 300LBS, 600LBS, 900LBS, 1500LBS, 2000LBS, 3000LBS kuya ku-9000LBS.

I-ASTM A234 ifaka ukufakwa kwamapayipi angenamthungo futhi ashiselwe:
Okufakwayo kwepayipi lensimbi elingenamthungo kubhekisela ekufakweni kwempahla eluhlaza evela emapayipini ensimbi angenamthungo namashubhu;Ngakho izifakelo zamapayipi ensimbi ashiselwe zihlanganisa izinto ezisetshenziswayo ezivela kumapayipi ensimbi ashiselwe.
Kuzophawulwa ukuthi,
Ukucaciswa kwe-ASTM A234 akufaki okokufakwa kwe-cast welding noma okokufaka okwenziwe ngomshini.

Izinqubo zokukhiqiza izifakelo zamapayipi ensimbi:
Izinqubo zokukhiqiza izifakelo zamapayipi zihlanganisa imisebenzi yokubumba nokubumba. Kanye nokucindezela, ukushaya ngesando, ukubhoboza, ukukhipha, ukucasula, ukugoqa, ukugoba, i-fusion welding kanye nemishini. Noma izinqubo zokuhlanganisa ezimbili noma ngaphezulu zale misebenzi.

Ngesikhathi sokukhiqiza amapayipi ensimbi, imisebenzi engezansi izoqashelwa:
1) Ukungapheleli okulimazayo, amaphutha wokushisela ngeke adalwe.
2) Ngemva kokubumba noma ukwenza okokufaka ezingeni lokushisa elifanele, izopholiswa endaweni efanele ibe izinga lokushisa elingaphansi kwebanga elibucayi. Futhi akukho sici okufanele senziwe ngesikhathi sezinqubo zokupholisa. Ukushesha kokupholisa akumele kube ngaphezu kwasemoyeni.
3) Ukuhlolwa okufanele kuzokwenziwa ngemuva kokukhiqiza. (Ukuhlolwa kwe-Hydrostatic, ukuhlolwa kokuqina, ukuhlolwa kwe-tensile njll)

I-alloy steel pipe fittings amamaki ku-ASTM A234

Ukufakwa kwepayipi lensimbi ye-alloy kwakhiwa ngezinto ezixubile njenge-Chrome, i-Molybdenum, i-Nickel alloy, i-Hastelloy alloy, i-Monel, i-Inconel, njll. Ukuze uthole izilinganiso zokucindezela okuphezulu, amandla angcono, ukumelana nokugqwala okuhle, nokuqina okude. Isetshenziswa kabanzi kumapayipi kawoyela negesi, ezimbonini zamakhemikhali, ezimbonini zikagesi, ezindaweni zamandla enuzi, nasezimeni zeseva.

Ukufakwa kwepayipi lensimbi ye-alloy kuhlanganisa ukufakwa kwe-buttweld, i-alloy steel engaba ukugoba okude, okokufaka okuhlanganisiwe kwensimbi nokunye.
I-alloy steel buttweld fittings isebenzisa i-ASTM A234 standard, ine-WP1, WP5, WP11, WP12, WP22, WP23 kanye ne-WP91 amamaki. Ileveli yekilasi ku-CL1, CL2, CL3.

Ukufakwa kwepayipi lensimbi ye-ASTM A234 ingxubevange yensimbi kufaka phakathi izindololwane zensimbi ye-alloy endaweni engaba yinde futhi emfushane, insimbi ye-alloy eccentric & concentric reducer, i-alloy steel caps & crosss, ama-couplings ensimbi ye-alloy, ama-alloy steel tee, izingono zensimbi ye-alloy, amakepisi ensimbi ye-alloy nokunye okwengeziwe. Inezinhlobo ezingenamthungo, ezishiselwe futhi ezakhiwe.
Okufakwayo kwensimbi ye-alloy, yamukela indinganiso ye-ASTM A182 ibhekisela kuma-flange epayipi ensimbi. Izinga lezinto ezibonakalayo ku-ASTM A182 F1, F5, F9, F11 Class 1, F12 Class 1, F22 Class 1 ETC.

Ukwakheka Kwamakhemikhali

Izidingo ze-Tensile