Seamless steel yeeb nkab thiab raj

Hex taub hau yog qhov zoo rau ntau hom kev lag luam fastener. Lub 6-tog qauv tsim ntawm 2205 Hex Bolt tso cai rau lub ntsia liaj qhov rooj kom nruj lossis loosened sai sai thiab zoo, txhim kho tag nrho ua haujlwm nrawm thiab nrawm dua. Qee cov txiaj ntsig ntxiv cuam tshuam nrog kev siv S32205 hex

Ib Flange yog ib qho kev tawm tsam, daim di ncauj lossis sab nraud, tog twg los sab nraud lossis sab hauv, uas yog cov nqaj hlau xws li ib tug t-nqaj); Rau cov ntawv yooj yim tau yooj yim \ / hloov ntawm kev sib cuag nrog lwm yam khoom (raws li flange thaum kawg ntawm cov yeeb nkab, chav dej lub tog raj kheej, lossis ntawm lub ntsej muag lub koob yees duab); Los yog rau kev ruaj khov thiab taw qhia kev txav ntawm lub tshuab lossis nws cov ntu (raws li sab hauv flange ntawm tsheb ciav hlau lossis lub log los ntawm kev khiav tawm ntawm cov ciav hlau). Lo lus "Flange" kuj yog siv rau hom cuab yeej siv los ua cov flanges.

Hastelloy C2000 tub tshij yog siv nyob rau hauv ntau hom petrochemical suav nrog cov khoom siv tshuaj lom neeg, roj kev tsim khoom siv, roj ntxiv thiab cov nroj tsuag hluav taws xob.

ASTM A240 Hom 2205 Phaj yog lub Duplex phaj yog siv ntau yam kev lag luam xws li kev ua yeeb yam, roj thiab roj kev tshawb nrhiav, thiab marine engineering. Sa 240 gr 2205 daim ntawv yog tsim los ntawm qib 220) stainless hlau, uas yog kev sib xyaw ntawm ferritic thiab ustenitic steel.

Nws ua rau pom zoo tsis kam mus rau nruab nrab thiab txo qhov chaw. Cov alloy no tsim ib zaj yeeb yaj kiab oxide, kev tiv thaiv zaj duab xis uas tsis tawm mus, tab sis nws khaws cov oxidation superi-sauv tsis kub.

Tubing yog tsim los ntawm kev ua kom tiav ntawm tubing nyob rau hauv uas lub tubing yog rub los ntawm cov khoom siv stainless billet thiab extruded rau hauv daim ntawv hoolled. Cov blanks yog thawj rhuab thiab tom qab ntawd tsim rau duab plaub hau, uas yog hollowed tawm hauv lub tshuab xuas nrig ntaus. Thaum tseem kub kub, rub cov pwm dua lub pas nrig Mandrel thiab lengthen. Lub Mandrel Milling cov txheej txheem nce cov tuag ntev nees nkaum nkaum los tsim cov nyom ntawm lub raj. Lub raj yog txuas ntxiv los ntawm pilger, txias rolling txheej txheem lossis kev kos duab txias.

Kev kho cua sov tsis cuam tshuam rau 254 smo stainless hlau yeeb nkab lawv tuaj yeem tsuas yog tawv ntawm kev puas tsuaj txias. SMO 254 ERW cov leeg muaj cov peev txheej zoo thiab ductility ntawm ambient thiab sub-xoom kub.
Qhov loj me "Od: 1 \ / 2" "~ 48" "

SS 316 Seamless Yeeb Nkab thiab ASTM A312 Welded Yeeb Nkab Khoom Siv Hauv Suav
Unr unic untist s31803 \ / 2205 yog ib qib hlau thib ob nrog Ferritic-Austenitic Micrubtructure. Lub alloy muaj kwv yees li 40-50 ferrite nyob rau hauv anealed mob.
Monel 400 YEEB RAU COV FRESE rau EYEARLASSES

Kev kho deg: dog dig (galvanized (zinc pob tshab), Zinc Dub, oxidized dub, dacromet lossis lwm tus raws li koj qhov yuav tsum tau ua

Nickel Alloy C-276 thiab Hastelloy C-276 tuaj yeem welded los ntawm txhua txoj kev vuam hlau (oxyacetylene tsis pom zoo).

A789 unc unic s31803 thiab unspes ob qib ntawm ob chav stainless hlau uas tau siv dav hauv ntau cov ntawv thov. Cov txiv neej duplex s31803 Seamless kav yog paub rau lawv cov txiv neej ua hauj lwm zoo, muaj lub zog siab, thiab weldability thiab zoo weldability. A789 yog ib qho tshwj xeeb uas tau them seamless thiab welded tub ua los ntawm duplex steel stainless hlau.

Alloy 800 yog npib npib tsib xee-chromium alloy nrog siab zog thiab kev tiv thaiv zoo rau oxidation thiab corrosion ntawm qhov kub. ASTM B407 UNICS NC08800 INCOLOY 800 W. NR. 1.4876 Welded yeeb nkab yog dav siv rau kev tsim kho cov khoom siv uas yuav tsum tau ua rau corrosion tsis kam, lub zog, thiab ruaj khov rau kev pabcuam txog 1500 ° F (816 ° C).

Cov tshuaj lom neeg muaj kuab lom ntawm 2205 duplex stainless yeeb nkab muaj cov ntsiab lus siv nyob rau hauv cov ntsiab lus hauv qab no I.E. - 22% Molybdenum thiab li 5 txog 6% npib tsib xee. Vim hais tias ntawm cov ntsiab lus, nyob rau hauv cov ntsiab lus ntawm ntau ntawm chromium qhov tam sim no nyob rau hauv alloy ntawm qib no, cov hlau no tseem hu ua 22cr dupleX 2205 yeeb nkab.

Alloy 310 tuaj yeem siv rau hauv cov kab mob hnyav, muaj cov oxidally muaj zog, nitriving, cementing thiab thermal cycling thov thaum tsis siv qhov kev pabcuam kub tshaj plaws.

Qhov no muab kev txhim kho zoo heev rau cov sulfuric acid. Nws kuj tseem muaj cov ntsiab lus chromium siab, kom ua kom zoo dua rau oxidizing tshuaj lom neeg cov tshuaj lom kabmob uas muaj kuab lom thiab yaj oxygen.

Nilo \ / alloy k w.nr.: 1.3981
UNRENT: K94610 ASTM F15
2101 yog lub npib tsib xee tsawg, ntshiv mos duplex stainless hlau muaj lub zog zoo dua thiab corroside kev ntxhov siab tsis kam thaum piv rau 300 series stainless hlau.
\ / 5 / raws li

Incoloy 800H Flange Peb muaj lub koob npe nrov hauv kev lag luam rau kev tsim cov hom kev ua haujlwm zoo ntawm cov hom uas yuav tsum tau ua rau peb cov neeg siv khoom. Peb tsim khoom tsim prololoy 800 flanges uas muaj kev ntseeg siab thiab siab dua. Peb siv cov peev txheej hwm thiab qib siab tshaj tawm rau kev tsim ASTM B564 UNFANCES 800 flanges.

ASTM A 312 tus qauv npog seamless steel yeeb nkab thiab ncaj-seam welded steel yeeb nkab kev pabcuam thiab dav dav rau cov tsev neeg tsis muaj roj stainless hlau.

254 Smo Bar yog lub siab sib cais Austenitic qib stainless. Qhov no stainless hlau qib tau tsim los siv nyob rau hauv seaterater thiab lwm yam xov xwm muaj corrosive chlorive.

ASTM A193 Qib B7 Lub Luag Haujlwm He Hex HeXT Ua kom muaj zog lub zog ua los ntawm tshav kub kho Alloyi 4140 \ / 4142 quenched thiab tempered.

Nws muaj cov ntxig siab loj-rupture muaj zog. Cov ntaub ntawv hauv qab no muab cov ntsiab lus ntawm Incoloy 800HT.

Nickel 200 flanges lub npib tsib xee 200 flanges yog ruaj, tshuav ruaj khov, thiab muaj kev ua tiav zoo. Ntxiv mus, cov ASTM B564 tsis pom N02200 dig muag flanges tiv taus ib puag ncig hauv nruab nrab thiab oxidizing ib puag ncig, ua rau lawv zoo meej rau kev siv hauv cov khoom siv khoom noj khoom haus.

Siab chromium, molybdenum thiab nitrogen cov ntsiab lus cuam tshuam nrog pitting tsis zoo rau cov medtenatent thiab corrosive corrosive conduction, thiab tseem ceeb pitting txias rau tag nrho cov xov xwm, thiab tseem ceeb pitting txias rau saum 50¡Ãc.

Nws yog dav siv nyob rau hauv cov roj pov thiab roj kev tshawb nrhiav \ / ntau lawm thiab hauv kev hloov cua sov hauv petrochemical \ / tshuaj lom neeg.

Cov khoom siv tsis tau yog suav tias yog tsim cov khoom lag luam qib marine thiab tsim yam tsis muaj vels lossis nqaws. Qeb ua cov xov xwm sib txawv thiab qhia tsis kam rau pitting caterposion los ntawm chlorides thiab tej yam paug. Cov kev siv tshuaj-qib siab ntawm qib no tiv thaiv kev kav dej ntev hauv dej lub cev. Txawm li cas los xij, cov kav dej-qib marine-qib muaj kev cuam tshuam rau cov dej sov.

Cov hlau stainless 904l \ / 1.4539 cov khoom siv tau los ua cov khoom kub thiab cov hlau thiab cov khoom siv sib tw, nrog rau kev siv roj ntsha thiab welded

Alloy Hlau Bars & Rods
Incoloy 800 lossis kuj tau hais txog raws li tsis yog N08800, Nickel 800 tau txais kev tiv thaiv zoo heev rau cov tshuaj thiab. Renowned rau nws lub zog siab tensile lub zog ntawm kev nce kub, alloy 800 kuj tseem tawm tsam oxidation, carburization nrog rau lwm hom kev kub siab-corrosion.

Qhov tshwj xeeb rau ISO chav kawm 4.8 tus qauv npog qib 4.8 cov fasteners zoo li bolts \ / screws \ / stips. Hom kev kawm nrawm nrawm 4.8 ntsia liaj qhov rooj tuaj yeem yog siv cov xov npib thiab zoo pitch xov kev tsim. Cov Chav Kawm 4.8 Cov Hluav Taws Hlau Carbon Steel Bolt tau tsim los ntawm cov roj av qis lossis nruab nrab hlau.

SCH40 monel 400 yeeb nkab raug xaiv raws li Werkstoff tus lej 2.4360 thiab tsis yog N04400. Alloy 400 cov kav hlau tseem hu ua monel aleloy 400 Yeeb Nkab, Monel 400 Yeeb & Nickel Alloy 400 Yeeb Nkab.

Lub corrosion resistant Hastelloy alloys tau siv dav los ntawm kev lag luam ua lag luam. Qhov kev xav tau rau kev ua tau zoo ua rau lawv txoj kev lees paub thiab kev loj hlob hauv thaj chaw ntawm lub zog, kev noj qab haus huv thiab ib puag ncig, roj thiab cov roj thiab cov roj cuv khw desulfurization.

Tus asme sa 105 WNRF Flange yog qhov zoo tagnrho rau cov chaw hnyav thiab tseem ceeb. Peb CS A105 Weld Neck Flanges paub txog lawv cov tensile zoo heev thiab khoom siv zog. Peb tuaj yeem hloov kho lawv raws li ib qho kev xav tau ntawm peb cov neeg siv khoom.
www.htsteelpipe.com
Lub raj seamless
Welded Yeeb Nkab
Welded Tube
Pom lsaw erw EFW
Beveled kawg, ntshiab kawg "
Loj od: 1 \ / 2 "" ~ 48 ""
Duplex Steel Fasteners
2205 duplex stainless yeeb nkab ntawm siab zoo
Ansi B16.5 Alloy C2000 Txo Flanges Thoob Ntiaj Teb Thoob Ntiaj Teb
Seamless Yeeb Nkab, Stainless Hlau Seamless Yeeb Nkab

ASTM A234 GR. WPB 45 Degree Luj tshib tshib, tseem hu ua xa rov qab lauj kaub, ua haujlwm kom hloov cov kev taw qhia ntawm kev ntws ntawm 45 degree kaum.

Nilo Alloy 36, W.NR 1.3912, Tiv Thaiv 36% Nickel-Npib thiab muaj tus nqi ntawm kev nthuav dav ntawm cov hlau.

Nws muaj peev xwm tiv thaiv ntau yam ntawm oxidizing thiab tsis-oxidizing tshuaj, thiab cov khoom ua kom pom tseeb zoo rau pitting thiab crevice nres nyob rau hauv muaj cov chlorides thiab lwm yam.

Alloy 800 Weld Neck Flanges Peb muaj lub koob npe nrov hauv kev lag luam rau kev tsim cov hom kev ua haujlwm zoo uas yuav haum rau peb cov neeg siv khoom. Peb tsim khoom tsim prololoy 800 flanges uas muaj kev ntseeg siab thiab siab dua. Peb siv cov peev txheej hwm thiab qib siab tshaj tawm rau kev tsim ASTM B564 UNFANCES 800 flanges.
Hastelloy alloys phau ntawv qhia
Lub raj seamless
Welded Yeeb Nkab
Welded Tube
Pom lsaw erw EFW
Beveled kawg, ntshiab kawg "
ASTM B407 UNRICS N08800 INCOLOY 800 Welded Yeeb Nkab
Duplex Steel Fasteners
2205 duplex stainless yeeb nkab ntawm siab zoo

Tsau-nthuav dav iav-encapsulated girapsulated alloys, muaj ib qho kev nthuav dav thermal, muaj ib lub khob hluav taws xob nthuav dav zoo ib yam li qhov ntsuas kub

Ib txoj kev sib koom ua ke flanged yog tsim ntawm peb cais thiab ywj siab yog tias muaj kev sib cuam tshuam; Cov flanges, lub gaskets, thiab cov bolting; Uas tau sib sau los ntawm kev cuam tshuam lwm tus cuam tshuam, fitter. Cov kev tswj tshwj xeeb yuav tsum muaj nyob rau hauv kev xaiv thiab kev xaiv ntawm tag nrho cov muaj cov ntsiab lus kom muaj kev sib koom ua ke, uas tau siv tau xau nruj.

Hastealloy yog ib lo lus uas hais txog ib pawg ntawm corrosion resistant hlau sib tov uas yog raws li npib tsib xee. Hastealloys muaj kev sib xyaw ua ke ntawm cov khoom uas muab rau lawv nrog lub zog loj corrosion corrosion customerance piv rau cov ib txwm muaj. Xws li, nws tau pom dav hauv cov txheej txheem tshuaj lom neeg thiab tam sim no muaj 50 xyoo-laus cov ntaub ntawv ntawm kev ua pov thawj ntawm cov tshuaj corrosive.

Cov fittings yog puab thiab tom qab ntawd rhuab mus rau lub siab kub raws li kev txias txias kom ze rau qhov txias txias hauv cov huab cua tseem. Qhov kev txias txias no ntxiv ntxiv rau lub zog ntawm lub stainless hlau 310 cov yeeb nkab fittings thiab ua rau lawv muaj zog ntau. Lub ss 310s haum siv nyob rau hauv kev lag luam zoo li dej hiav txwv ua, thermal zog tiam cov nroj tsuag thiab cov piping ntau li. 310s ss Weld fittings siv nyob rau hauv cov chav kawm siab sib txawv los daws tau cov kev xav tau ntawm daim ntawv thov ib yam nkaus.

S32750 S32760 SUPLLEX Stuple Stainless Hlau Pipes Nrog Cov Pitting Zoo Tshaj

Qeb 310S Stainless Hlau Taub Hlau Weld Yeeb Nkab Haum muaj cov pa roj hmab ntau, cov roj ntsha li cua sov, cov tshuaj tua hluav taws xob, tshuab ntxhua cua sov, offshore thiab lwm yam.

API 5L thiab Astm Seamless Steel kav yog tsim los ntawm cov hlau ua lossis cov leeg tawv, los ntawm cov leeg nqaij, uas tuaj yeem tsim los ntawm kub dov, txias dov, txias dua lossis muab khaub ncaws. Kub-dov seamless steel kav yog tsim los ntawm billet forging, tho, dov, shouing thiab lwm yam kev. Rau cov kav dej loj-ntawm cov kav dej loj thiab tuab-walled seamless kav, nws yog feem ntau tsim nyob rau hauv txoj kev no. Txias kev sib tw seamless yeeb nkab adopts txias-kos ua kev thev naus laus zis.

Lub Flange yog qhov thib ob feem ntau siv koom nrog txoj kev tom qab selding. Kev siv flanges tau siv thaum cov pob qij txha xav tau dismantling. Nws muab kev hloov tau rau kev saib xyuas. Flange txuas cov yeeb nkab nrog ntau yam khoom siv thiab li qub. Breakup Flanges tau ntxiv rau hauv cov raj xa hluav taws yog tias kev saib xyuas tsis tu ncua thaum lub sijhawm cog ntoo.

304 Piping spools yog tsim los ntawm 304 stainless hlau, ib qho khoom siv nrov thiab nrov tshaj plaws hauv ntau cov ntawv thov uas xav tau kev tiv thaiv kom xeb thiab oxidation. Cov kev tshaj lij no yog preooss siv cov machinery thiab cov txheej txheem tshwj xeeb, uas paub meej tias lawv muaj tseeb thiab ntseeg tau.
Inconel yeeb nkab yog ua los ntawm cov khoom uas tau ua kom zoo rau qee qhov kev siv hnyav tshaj plaws yuav tsum pom kev tsim khoom. Txawm hais tias piv rau stainless hlau, inconel muaj qhov siab heev rau siab rau cov cua sov, thiab tsis poob ntau ntau yam ntawm cov hlau.
Nickel-Tooj-based alloy 400 monel 2.4360 txias kos cov kab mob kev ntxhov siab thaum raug rau corrosive cracking thaum raug rau cov media corrosive nyob rau hauv ib puag ncig ib puag ncig. Monel 400 yog tooj liab thiab nickel raws li alloy uas nrov niaj hnub no vim nws qhov kev ua tau zoo. Lub alloy muaj kua qaub zoo heev thiab alkali tsis kam. Tsis tas li ntawd, nws muaj cov zog tensile muaj zog, ductility, zoo heev thermal condactivity, thiab tuaj yeem yog tawv los ntawm kev ua haujlwm txias. Ib qho ntxiv, nws tuaj yeem siv rau hauv cov ntawv thov nrog qhov kub thiab txias txij li rho tawm txog 538 degrees Celsius.

ASME B36.19M yog tus qauv kev qhia tshwj xeeb rau cov kav hlau stainless hlau, uas qhia txog kev ua siab ntev, thiab tsim khoom rau cov kav dej thiab cov txiv ntseej.

Nickel Alloy Incoloy Seamless Yeeb Tub Yeeb Tube Nqe 800 800H 800HT n08810 n08811

ASTM \ / ASME A106 \ / SACE106 Seamless Cov Yeeb Nkab yog siv hauv kev lag luam piping cuam tshuam nrog kev siv cov khoom siv cua sov, nrog rau cov txheej txheem kev tsim khoom, cov chaw ua haujlwm ntawm cov khoom siv hluav taws xob.

Cov khoom muaj lub zog zoo nrog 240MPA yam tsawg kawg nkaus zog zog thiab 585mpa yam tsawg kawg tensile lub zog.

Alloy 317 Flange yog ib tug Austenitic chromium-npib tsib xee stainless hlau nrog cov corrosion zoo heev. Lub siab molybdenum cov ntsiab lus ntawm ASME SAME SA182 ss 317 tus pa taws muaj peev xwm ua rau qib ua tau zoo tshaj plaws.

SMO 254 Cov kav dej tuaj yeem tiv taus cov kev ntxhov siab ntawm cov neeg muaj kev ntxhov siab thiab alloy 254 smo yeeb nkab siab ua haujlwm nyob rau hauv cov kub thiab xeb ib puag ncig.

Tsis suav txog N08367 tseem hu ua Alloy Al6XN yog cov carbon ntau, siab purity, nitrogen-batoy nrog zoo heev rau chloride pitting thiab compevice corrosion.

Nickel alloy 400 thiab Monel 400, tseem hu ua UN tsis zoo li N04400, yog ib qho laj thawj ntawm cov menyuam yaus uas muaj feem ntau ntawm ob feem peb ntawm ob feem ntawm ob-tus tooj liab. Nickel Alloy 400 yog paub txog nws txoj kev tiv thaiv rau ntau yam ntawm cov kab mob ntawm cov xeb, suav nrog cov alkalis (lossis cov kua qaub), dej hli, thiab sulfuric acid. Txij li thaum Monel 400 lossis Alloy 400 yog cov hlau txias ua haujlwm, cov alloy muaj siab tawv, txhav thiab muaj zog. Los ntawm kev ua haujlwm txias ASTM B14400 Bar Tshuag, cov alloy yog raug rau cov kev ntxhov siab ntau dua, uas nyob rau hauv Alloy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Microy Micro ..

Inconel 625 coil yog cov yam ntxwv zoo los ntawm nws cov kev tiv thaiv zoo rau oxidation, qhov siab-kub corrosion thiab qaug zog. ASTM B443 tsis yog N06625 Inconel P phaj tau siv dav hauv Aerospace, kev ua lag luam thiab roj thiab muaj zog zoo dua qub txawm tias muaj ib puag ncig zoo.

Caw 36 ® yog npib npib npib tsib xee, tsis muaj nyiaj npib ob leeg uas muaj 36%, commar 36 muaj qhov kub tsawg los ntawm kev nthuav dav ntawm + 500 ° F (260 ° C).

Txoj haujlwm ntawm stainless hlau flange yog qhov tseeb tau txuas cov yeeb nkab kawg nrog cov yeeb nkab kawg. Muaj cov cuab yeej siv flange ntawm ntug flange, thiab cov hlau steel hlau ua rau ob lub plees ua kom nruj. Thaum sib txuas, gaskets, ptfe gaskets, cov gaskets, silicon gaskets, thiab lwm yam ntawm flanges rau kev sib khi.

Cov yeeb nkab fittings ntawm cov duab tshwj xeeb lossis cov tsis haum rau kev tuag tsis zoo dab tsi uas haum yuav tsum tau forged los ntawm kev pub dawb; Yog hais tias tus tee, yuav tsum tau forged tawm ntawm ceg yeeb nkab.

Npib tsib xee raws 800 incoloy hexagonal yeeb nkab yog paub kom muaj qhov zoo tiv taus corrosion. Tshwj xeeb hais txog kev hais lus, tus incoloy 800 yeeb nkab muaj txaus tiv taus ob carburization zoo li oxidation corrosion.

Cov kav dej ntawm seamless configurations tau muaj peev xwm ntau dua cov muaj peev xwm thiab lub zog tshaj lwm qib.

Inconel 718 yog npib tsib xee-chromium-based alloy uas feem ntau siv nyob rau hauv cov ntawv thov kub siab xws li aerospace thiab roj turbines. Ib qho ntawm cov tseem ceeb tshaj plaws hauv kev tsim cov astm b670 inconel 718 daim ntawv yog lub phaj dov. Muaj ob hom tseem ceeb ntawm inconel 718 daim hlau muaj nyob rau ntawm kev ua lag luam: kub dov thiab cov phiaj txias. Cov paib.

Lub stainless hlau dej khoom siv flange muaj tag nrho cov khoom ntawm stainless hlau cov ntaub ntawv, uas tuaj yeem ua kom muaj kev ncaj ncees ntawm tus tsim.

Stainless hlau DIN 1.4539 hauv qab ntawm cov flanges, stainless hlau 904L flange hlau weld flanges, stainless hlau sus 904L Orifice Flange Chaw tsim tshuaj paus
Hastelloy alloys phau ntawv qhia
Lub raj seamless
Welded Yeeb Nkab
Welded Tube
Pom lsaw erw EFW
Beveled kawg, ntshiab kawg "
ASTM B443 Tsis yog N06625 Phaj Inconel 625 Kaujric Tsim
Duplex Steel Fasteners
2205 duplex stainless yeeb nkab ntawm siab zoo

ASTM A420 WPL6 cov yeeb nkab fittings xws li WPL 6 lub kaus mom, A420 Wpla Weld fittings, thiab sa 420 WPL6 Luj Tshib. Peb cov Tshuag ntawm cov fittings kub tsawg suav nrog A420 qib kev ua tiav ntawm A420 fittings hauv cov ntau thiab tsawg thiab tuab.