ASTM A234uamea masanimea fa'apipi'i paipaua faʻaaogaina lautele i faiga paipa, e aofia ai le uamea carbon ma mea uamea uʻamea.

O le a le mea fa'apipi'i paipa uamea?
O le fa'aogaina o paipa u'amea e faia i le u'amea uamea po'o le paipa u'amea u'amea, ipu, fa'amatalaga, i se foliga patino e mafai ona faia ai se galuega (Suia le su'esu'ega po'o le fua) i faiga paipa. O le tele o nei mea faʻapipiʻi e aofia ai le tulilima uʻamea (45 poʻo le 90 tikeri piʻo), tee, faʻaitiitiga (concentric poʻo faʻaitiitiga faʻaitiitiga), koluse, pulou, susu, flanges, gasket, studs ma isi.

Mo faamoemoega tau alamanuia, i faiga paipa e masani lava ona tatou manaʻomia le suia o le itu o felauaiga; Fetuuna'i vai (suau'u ma kesi, vai, slurry) tafega; Tatala pe tapuni laina paipa, ma isi. Ina ia faʻamaeʻaina nei gaioiga, o le a faʻaogaina paipa uʻamea.

O le a le ASTM A234 WPB?
ASTM A234 o Fa'amatalaga Fa'apitoa mo paipa u'amea fa'apipi'i e aofia ai u'amea kaponi ma mea u'amea u'amea mo auaunaga feololo ma maualuga. E ufiufi u'amea fa'apipi'i o ituaiga e le'i fa'aogaina ma uelo. O mea fa'apipi'i paipa uamea o lo'o fa'aogaina i paipa fa'amalosi ma i faufale va'a. O mea fa'apipi'i nei e aofia ai u'amea fa'amateina, fa'alava, fa'amau, ipu, mea fa'aoga paipa e le fa'aogaina po'o le HFW (fusion welded), fa'atasi ai ma uamea fa'atumu.

ASTM A234 e aofia ai u'amea kaponi u'amea ma u'amea u'amea fa'apipi'i o fau'aga e le fa'aogaina ma uelo fa'apipi'i i le toe iloiloga lata mai o le ASTM B16.9, B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, ma le MSS. -SP-97. ma isi.

E pei ona tatou iloa, ASTM A234 paipa uʻamea faʻaoga e faʻaogaina i paipa faʻamalosi ma i totonu o le faʻapipiʻiina o vaʻa, mo auaunaga i le feololo ma le maualuga o le vevela. O mea fa'apipi'i i totonu o lenei fa'ata'ita'iga e aofia ai u'amea mate, fa'amau, fa'amau, ipu, mea fa'apipi'i fa'apipi'i po'o fa'afefiloi fa'atasi ma fa'apipi'i u'amea fa'atumu.
I lenei tulaga e aofia ai le faʻamatalaga o tulilima, tees, faʻaitiitia, pulou ma koluse, e masani ona faʻaaogaina pito uʻamea.

ASTM A234 paipa u'amea fa'apipi'i fua
Tulaga: ANSI / ASME B16.9, B16.28, MSS-SP-43.
Vaitaimi fafo: 1/2" i le 48"
Va'aiga Mafiafia: SCH 10, sch 20, SCH 40, SCH STD, SCH 80, SCH XS, SCH 160, SCH XXS ma isi.
Pipa u'amea fa'apipi'i tu'aiga fa'ameamea ile fa'ameamea, filo, uelo fa'amau, ma fa'alelei.

Fa'ailoga ile ASTM A234:

ASTM A234 faʻamatalaga e tele togi, e pei o WPB, WPC, WP5, WP9 WP11, WP12, WP22, WP91 ma isi.
I nei tulaga masani Grade WPB o le mea sili ona taatele e faʻaaogaina mo paipa maualuga ma maualuga. W o lona uiga e mafai ona uelo, P o lona uiga o le mamafa, B o le vasega b, fa'asino i le malosi maualalo maualalo.
O le puna o mea mata o ASTM A234 WPB paipa paipa e mafai ona maua mai paipa u'amea, e pei o le ASTM A106 Gr.B ma C. Fa'apena fo'i mai ipu u'amea, pei ASTM A285 Gr.C, ASTM A516 Gr 70, ASTM A572 ma isi.

ASTM A234 WPB paipa uʻamea fetaui vailaʻau ma mea faʻainisinia:
1) Vasega WPB faʻapipiʻi faia mai paipa uʻamea poʻo papatusi maualuga C e 0.35%.
2) Fa'apipi'i mea fa'apipi'i Carbon content 0.35% maualuga ma Silicon content 0.35% maualuga, leai se la'ititi.
3) Mo fa'aitiitiga ta'itasi o le 0.01 o le Carbon content, fa'atuputeleina le maualuga o le Manganese i le 0.06%, e o'o atu i le maualuga 1.35% mo Mn.
4) Kopa, Nikeli, Niobium ma le Molybdenum aofaiga e le tatau ona sili atu i le 1.00%.
5) Niobium + Molybdenum e le sili atu i le 0.32%.

Mea fa'ainisinia o paipa ASTM A234 WPB:
Malosi Tetele 60,000 pis 415 Mpa
Malosi e maua 35,000 psi 240 Mpa
Fa'ailoga Fa'atonu: 150LBS, 300LBS, 600LBS, 900LBS, 1500LBS, 2000LBS, 3000LBS i le 9000LBS.

ASTM A234 e aofia ai paipa faʻapipiʻi ma uelo:
Mo le fa'aogaina o paipa u'amea e fa'atatau i mea fa'apipi'i mata mai i paipa u'amea ma fa'agaau; O lea o le fa'apipi'iina o paipa uamea e ufiufi ai mea fa'apipi'i mai paipa uamea.
E tatau ona maitauina,
ASTM A234 faʻamatalaga e le aofia ai mea faʻapipiʻi uʻamea poʻo mea faʻapipiʻi e faʻaaogaina mai mea faʻapipiʻi.

Pipa uamea fa'apipi'i fa'agasologa faiga fa'avae:
O fa'agasologa o le gaosiga mo paipa fa'apipi'i e aofia ai le fa'amaina ma le fa'afuaina. E faʻapea foʻi ma le oomi, samala, tuʻia, faʻafefe, faʻafefe, taʻavale, punou, faʻafefiloi ma masini. Po'o le fa'agasologa o le tu'ufa'atasia o le lua pe sili atu o nei fa'agaioiga.

I le taimi o le gaosiga o paipa uamea, e tatau ona matauina gaoioiga i lalo:
1) Faʻaleagaina le atoatoa, faʻaleagaina faʻaletonu e le tatau ona faia.
2) A maeʻa ona faʻapipiʻi poʻo le faʻapipiʻiina o mea faʻapipiʻi i se vevela talafeagai, e tatau ona faʻamafanafana i totonu o se siosiomaga talafeagai i se vevela e i lalo ifo o le tulaga ogaoga. Ma e leai ni faaletonu e tatau ona faia i le taimi o le fa'amalo. O le saosaoa o le mālūlū e lē tatau ona sili atu nai lo le ea.
3) E tatau ona faia suʻesuʻega talafeagai pe a uma le gaosiga. (Su'ega Hydrostatic, su'ega malo, su'ega tensile ma isi)

Fa'ailoga paipa uamea fa'apipi'i i le ASTM A234

O le fa'aogaina o paipa u'amea fa'apipi'i e fa'apipi'iina i elemene u'amea e pei o Chrome, Molybdenum, u'amea Nickel, u'amea Hastelloy, Monel, Inconel, ma isi. Ina ia maua se fa'atonuga maualuga o le mamafa, sili atu le malosi, lelei fa'afefete, ma umi umi. E fa'aaogaina lautele i paipa suauu ma kesi, fale kemisi, fale eletise, nofoaga eletise faaniukilia, ma i tulaga o le server.

O mea fa'apipi'i paipa u'amea e aofia ai mea fa'apipi'i buttweld, u'u u'u radius u'amea u'amea, mea fa'apipi'i fa'ameamea fa'ameamea ma isi mea faapena.
O mea fa'apipi'i u'amea u'amea ua fa'aaogaina ASTM A234, ei ai togi WP1, WP5, WP11, WP12, WP22, WP23 ma WP91. Vasega vasega ile CL1, CL2, CL3.

ASTM A234 fa'apipi'i paipa u'amea e aofia ai tulilima u'amea u'amea i le umi ma pupuu radius, u'amea u'amea eccentric & concentric reducer, u'amea u'amea pulou & koluse, u'amea uamea so'o, u'amea uamea tie, u'u u'amea u'amea, pulou u'amea ma isi fomu. E i ai seamless, uelo ma mea fau.
Mo u'amea fa'apipi'i u'amea fa'apipi'i, e fa'aaogaina le ASTM A182 fa'ata'ita'iga e fa'atatau ile paipa u'amea. Fa'ata'ita'iga fa'apitoa ile ASTM A182 F1, F5, F9, F11 Vasega 1, F12 Vasega 1, F22 Vasega 1 ETC.

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