Incoloy tube

ASTM A240 please 2205 bụ efere doccles nke ejiri rụọ ọrụ nke ukwuu na nhazi dị iche iche dị ka nhazi kemịkalụ, mmanụ ụgbọ mmiri. A na-eme mpempe akwụkwọ 3055 na ọkwa 2205 ígwè, nke bụ ngwakọta nke ferritic na chara acha.

A na-egbochi iri nathol-chromium-chrom nke na-ejikarị ngwa dị elu na ngwa dị ka ọrịa aerospace na gas. Otu n'ime ihe ndị kachasị mkpa na mmepụta nke ASTM B670 akwụkwọ mpịakọta 718 bụ mpempe akwụkwọ mpịakọta. E nwere ụdị abụọ nke eriri afọ 7118 dị na ahịa: a na-ekpo ọkụ na efere oyi.

316L 1.4401 s31603 nchara nchara bụ nke dị ukwuu nke ukwuu na nke na-adịgide adịgide nke ejiri na-abụkarị ihe a na-ejikarị ọtụtụ ọrụ mmepụta ihe na ngwa ahịa. A na-eme ss ss s31603 site na elu dị elu 316l nchara dị iche iche na-eguzogide corrosion, oxidation na ngwakọta, na-eme ka ọ dị mma maka gburugburu ya ma ọ bụ ngwa nrụgide siri ike.

A na-eji eriri afọ 625 mara nke ọma na oxidation, ọnọdụ-okpomọkụ dị elu na ike ọgwụgwụ. A na-ejikarị efere ASTM B443 na-enweghị isi na Aerospace, nhazi kemịkalụ na mmanụ na mmanụ n'ihi ike ya, ike na ịdị ogologo ndụ na mpaghara dị iche iche.

Alloy 800 bụ Nickel-chroy alloy na ike dị elu na nguzogide ike na oxidion na corrosion na oke okpomọkụ. ASTM B407 enweghị isi N08800 Incoloy 800 W. NR. A na-ejikwa 1876 welded pipe na-eji ihe eji arụ ọrụ na-arụ ọrụ corrosion, nguzogide, ike, na nkwụsi ike maka ọrụ ruru 1500 Celsius F (816 Celsius C).

Igwe nchara 316 nchara abụrụla ihe dị mkpa maka mpaghara mmepụta ihe. A nabatara Alloy nke ígwè na Chrome maka nguzogide ya dị elu na corrosion, yana ịdịte ya. E nwere ike imepụta eriri nchara na-enweghị mmiri ma welded tubes iji zute mkpa ndị ahịa.

A na-eji tubes c2000 ọtụtụ ụlọ ọrụ dị iche iche gụnyere nhazi petrochemical, usoro nhazi ngwa kemịkalụ, mmagharị mmanụ na osisi.

A na-eduzi site na nha dị iche iche na oke nha na ọkpụrụkpụ dị iche iche, ụdị Nickel-Chromium-Chromium-molyybdeom maka ike ya na nguzogide corrosion.

Al6xn bụ nebisenitic nchara dị ukwuu site na nguzogide pụtara ìhè na chloride na-akwụ, corvice corrosion na nrụgide corrosion. Al6xn bụ alyy alloy 6 moly mepụtara maka ma ejiri ya rụọ ya na gburugburu ebe obibi. O nwere otutu nickel (24%), molybdenum (6.3%), nitrogen na chromium na-enye ya oke iguzogide ya chloride na chloride na-eguzogide nguzogide. A na-eji AL6XN nke ọma maka ike ya na crovice na-eguzogide na chlorides. Ọ bụ igwe anaghị agba nchara.

N08367 na-ekwukarị na Alloy Al6xn bụ carbon dị ala, ịdị ọcha nke ukwuu "Nickel-mulybdem na-enwe ike iguzogide chloride na corrosion.

SMO 254 Pipes nwere ike iguzogide nrụgide dị elu na alloy 254 SMO pipe dị elu na-arụ ọrụ na oke okpomọkụ na gburugburu corrosive.

Nke a na-enye nguzogide nke ukwuu na sulfuric acid. Ọ nwekwara ọdịnaya chromium dị elu, iji bulie nguzogide ya na kemịkal na-agafe agafe site na oxygen na-agbaze.

O nwere ike iguzogide ọtụtụ ihe kemịkal na kemịlị na-enweghị oxiding, ma na-egosipụta oke iguzogide na-efe efe na ọnụnọ nke chloride na ndị ọzọ.

Ọ na - egosipụta ezi nguzogide na-anọpụ iche na ibelata gburugburu. Alloy a na -emepụta oxide ube, ihe nkiri na-egbochi nke na-adịghị ada ada, mana ọ na-ejigide nguzogide na-eguzogide na-enwu ọkụ.

A na-ejikarị ya na mmiri na gas gas \ / imepụta na ndị na-agbanwe ọkụ na Petrochemical \ /.

Ibelata titanium bụ ihe dị ka 60% nke igwe anaghị agba nchara na nickel alloys, ịchekwa ibu a na-eme ka ọ bụrụ nhọrọ a ma ama na ngwa dị ka Aerospoce.

Ntụgharị 600 nke usoro nke ọkọlọtọ N06600 na ASTM B167 bụ ndị mepụtara iji kwado nnukwu nrụgide ma bịa na nnukwu akwụkwọ ikike.

A họpụtara Sch40 Mon 400 PIPE dị ka nọmba Werkstoff 2.4360 na enweghị N04400. Alloy 400 pipe a makwaara dị ka mone alloy 400 pịpe, mone 400 pịp & nickel alloy 400 pịchaa.

Ọkpụkpụ nke nhazi na-enweghị isi nwere ikike ibu na ike dị elu na ume elu karịa akara ule ndị ọzọ.

Ọdịnaya dị elu, Molybden na nitrogen dị elu na-ebute nguzogide na-arụ ọrụ na steeti na-arụ ọrụ na steeti niile na-eme ihe niile dị na mbara igwe karịa 50¡ãc.

Ndenye aha yabays
Industlọ ọrụ na-arụ ọrụ na-egbochi corrosion. Mkpa ọrụ a pụrụ ịdabere na ya na-eduga na nnabata na uto ha n'akụkụ ike, ahụike na gburugburu ebe obibi, mmanụ na gas, ọgwụ na-emepụta ihe gas na-eme mkpọtụ.

Nkọwapụta 800h 800h anyị nwere aha siri ike na ụlọ ọrụ maka ịmepụta ụdị dị elu nke ụdị ndị ahịa anyị chọrọ. Anyị na-emepụta na-emepụta 800 flanges nke a pụrụ ịdabere na ya ma dị mma. Anyị na-eji akụrụngwa adịchaghị mma na igwe dị elu maka ịmepụta ASTM B564 na-enweghị isi n0800.

Alloy 800 Hell Holy na-agbasa na ụlọ ọrụ maka ịmepụta ụdị dị elu nke ụdị ndị ahịa anyị chọrọ. Anyị na-emepụta na-emepụta 800 flanges nke a pụrụ ịdabere na ya ma dị mma. Anyị na-eji akụrụngwa adịchaghị mma na igwe dị elu maka ịmepụta ASTM B564 na-enweghị isi n0800.

Nickel 200 Fanges 200 flanges na-adịgide adịgide, ọnọdụ dị iche iche, ma nwee mmezu dị mma. Ọzọkwa, ASTM B564 na-enweghị isi n02200 flassion na-eguzogide corrosion na gburugburu oxiding na optinaiti na oxidizing gburugburu, na-eme ka ha zuo oke maka iji ngwa nri.

Akụkụ ọzọ dị mkpa nke n08800 coneloy efere dị oke mma bụ ezigbo nguzogide na chlorine na-agbaso corrosion cracking, nke metal, dị ka ndị ọzọ na-agbanwe agbanwe na-enweghị atụfu.
Platdị efere, mpempe akwụkwọ, mpempe crail
Ogologo 0 ~ 12m ma ọ bụ dịka ihe ịchọrọ
Obosara 0 ~ 2500mm ma ọ bụ dịka ihe ịchọrọ
Ọgwụ (0.3 ~ 1200mm ma ọ bụ dịka ihe ịchọrọ

Angel 600 bụ Nickel-Chromium-chroy iroy nwere ezigbo corrosion iguzogide, nkewa na ike dị elu na elu elu. N'ihi ọdịnaya Nickel, enweghị mgbagha 600 na-eguzogide ọgwụ chloride corrosion cracking. Achọghị ihe mgbochi afọ a chọghị dịka Internal 600 siri ike ma wusie ya ike. Internal 600 nwere ike ịrụ ọrụ na okpomọkụ dị ala dịka 700¡Ãf (370¡ãc).
Accond Sus, AISI, din
Dayameta 5 ~ 500mm
Ogologo ¨q12m ma ọ bụ dịka ndị ahịa chọrọ

Gburugburu ụlọ mmanya na-atụ egwu ma na-anwale, dị na ngwaahịa ma ọ bụ belata ya nha. Alloy Round na-enye ike na nguzogide dịgasị iche iche na mpaghara dịgasị iche iche ma enwere ike iji ya na etiti, igwe na-arụ ọrụ, ọrụ nri na ụlọ ọrụ ngwaọrụ ngwaọrụ.
Accond Sus, AISI, din
Dayameta 5 ~ 500mm
Ogologo ¨q12m ma ọ bụ dịka ndị ahịa chọrọ

Ọtụtụ ndị na-azụ ahịa na-ahọrọ eziokwu ahụ na-enweghị mgbagha 600 bụ nke ukwuu. Ya mere a na-eji alloy mee ihe n'ọtụtụ ụlọ ọrụ ihe dị iche iche gụnyere pọpụ 600 a ma ama. Enwere ike ịrụ ọrụ ọkpọkọ ndị a ma ọ bụ na ha nwere ike ịbụ onye nzuzu. E nwere uru iji ha abụọ uru. Maka E.G. Mmasị nke ọkpọkọ 600 welded, dị na ngwa ebe akụnụba ya na-arụ ọrụ dị oke mkpa. Ọ bụ ezie na ọnụ ala karịa nke enweghị onye a rụrụ otu, ọkpọkọ ndị a nwere ogologo ọganihu, nke nwere ike ịnwe ike na njikọta - ọ bụrụ na ha haziri hazie. N'ọnọdụ, ebe onye na-azụ ahịa chọrọ ụdị corsonion iguzogide nguzogide na ike iguzogide nrụgide dị elu, enweghị mgbagha 600 enweghị nhọrọ kachasị mma.
Pịnye pịnye nkịtị
Tum tum tum
Achịcha
Welded tube
Hụrụ Lsaw EFW
Akwụsị Ọgwụ, Ọgwụgwụ Laut "
Odi Odi: 1 \ / 2 "~ 48" "
Ọkpụrụkpụ: Sch5 ~ Schxxs
Ogologo: dị ka ọ chọrọ. "
Usoro na-emepụta usoro na-enwu ọkụ \ / ọrụ na-ekpo ọkụ, oyi mpịakọta
Na-emepụta ọkọlọtọ ASME B36.10 Asme B36.20

Maka ebumnuche mmepụta, na sistemụ pipeline, anyị na-achọkarị ịgbanwe ụzọ nke ịnyefe. mezie mmiri mmiri (mmanụ, mmiri, apịtị); Mepee ma ọ bụ chiri piọtị, wdg. Ya mere, iji rụzuo ihe omume ndị a, a ga-etinye ya fil fripe.

A maara Nickel dabere na 800 Incoloy Hexagol pipe na-enwe ezigbo nguzogide corrosion. N'ezie, ịsụ asụsụ, Incoloy 800 pipe na-enye iguzogide iguzogide carburtization abụọ ahụ yana corrosion.

Carbon nchara flange bụ ụdị rim guzobere na njedebe nke ọkpọkọ mgbe ọ na-edobe ya na ọkpọkọ. A na-eji ya mechie nsọtụ pipes, valves ma ọ bụ njikọ ndị ọzọ. O nwere ike tensile dị elu ma dị na mbara ihu na nkwado Convex na-akwado maka nrụnye dị mfe. Ọ bụ alloboy-carbon nke nwere ihe ruru 2.1 wt.% Carbon. Carbon ígwè enweghị opekata mpe nke ihe ndị ọzọ na-enye ọgbụgba, mana ọ na-enwekarị manganese.

Uzo s32205 Standard ASME SE182 B WELD SELD FLANGE FLANGE FLANGE FLANGE FLANGE FLANGE FLANGELỌ EGO NA-EGO NA-EGO NA-EKWUPUTA ROMBỌRỌ NSỌ RURT REBỌRỌ EGO.

Hastelloy c-266 bụ ning St St sublow agbakwunyere na Tungsten, nke nwere nguzogide nguzogide na gburugburu ebe nsogbu siri ike. Oké ọdịnaya nke ni na mo na-eme nil alloy alloy na-eguzogide ike na-enwe ike na gburugburu ebe obibi, ebe cnye na-arụ ọrụ arụmọrụ nke ọgwụ mgbochi.

Ọ bụ ezie na Molybum bụ ezigbo ihe, iji ya mee ihe ike iji belata nrubeisi nke creep f11 prate flanges. Imaghiadi na ndu nke carbide nwere ike ime mgbe ọnọdụ okpomọkụ karịrị 500 Celsius. A tinyela Chromium na sa a182 f11 lul steel cl.2 gbaghara agbachapụ na-egbochi mbelata na eserese. Na mgbakwunye, chromium agbakwunyere na-enyekwa usoro nguzosi ike.

A na-ejikarị flanges ígwè dị iche iche na injinia ji, igwe na-eme ihe. Duplex stanges S31803 langes dị mma maka ngwa chọrọ iguzogide iguzogide nguzogide karịa ụdị 316 ma dị mma ike okpomọkụ. Anyị nwere Ruplen steel s31803 \ / S32205 Frances na ngwaahịa. A na-ejikarị flanges è na kemịkal, petrochemical, na ụlọ ọrụ ike ike.

Nickel 200 bụ ihe ngwọta siri ike si etisie ya ike. Nickel 200 mmanya ngwaahịa nwere 99.6% WROVEL WROVEL site na ibu ma na-ewere azụmahịa na azụmahịa. Din 2.4066 Bar nwere ezigbo ọrụ na ihe anụ ahụ. Dịka ọmụmaatụ, ASTM B160 N02200 nwere ezigbo nguzogide n'ọtụtụ ogige corrosives yana gburugburu corrosive. Ka ọ dị ugbu a, nickel 200 bụ ihe ga-eme ka ihe ngwọta siri ike mee ka ọ dị ka okirikiri na mkpanaka. A na-eji ihe abụọ ndị a na-ejikọ ọnụ ma enwere ike ịmata iche site na ọrụ dị iche iche.

Alcoy-Coasper-Corpper 400 Monel 2.4360 na-atụfu mkpanaka na-egbochi ngwa ọgụ na-agba ọsọ na-efe efe mgbe ekpughere ya na gburugburu ebe a na-ahụkarị. Mone 400 bụ ọla kọpa na Nickel dabere na-ewu ewu taa n'ihi arụmọrụ ya dị elu. Alloy nwere ezigbo acid na alkali iguzogide. Na mgbakwunye, ọ nwere ezigbo ihe na-adịghị egwu egwu, na-akụda mmụọ, ọ na-eme ka ọ bụrụ ihe na-ekpo ọkụ, ma nwee ike ịrụkwa ọrụ oyi. Ọzọkwa, enwere ike iji ya na ngwa na okpomọkụ si na mwepu ruo 538 ogo Celsius.

Nickel Alloy 400 na monel 400, makwaara dị ka N044400, bụ Alcoy Nickel-Copper-Copper nke sitere na ọla atọ na ọla kọpa. A maara Nickel Alloy 400 maka iguzogide ụdị ọnọdụ ya, gụnyere alkalis (ma ọ bụ acid), mmiri nnu, na sulfuric acid. Ebe ọ bụ na Monel 400 ma ọ bụ alloy 400 bụ oyi na-arụ ọrụ na-arụ ọrụ, Alloy nwere oke isi ike, ike na ike. Site na oyi na-arụ ọrụ ASTM B164 na-enweghị isi N04400 Bark, a na-edo onwe ya ọkwa dị elu nke nrụgide nke ọma, nke na-ebute mgbanwe na microy.

Angel 600 Cour-Dabere na Nickel na alloy Carbuburation na nguzogide corrosion na oke okpomọkụ na oke okpomọkụ. Constil 600 Ogwe dị irè megide ihicha fl2 na ọtụtụ gas ndị ọzọ dị iche na dị nro ma dị elu. Alloy 600 Bar bụ nickel-Chromium Alloy na-enwe ezigbo nguzogide na-eguzogide ngọngọ, dị elu na-agba agba mmiri corrosion na oxidaụ acid.

Nilo \ / alloy k.Nr .: 1.3981
NKWUP :: K94610 ASTM F15
Igwe na-agbasa na-agbasa - na-agbasa ígwè-nickel-cobalt alloys, kovar alloys, nwere usoro mgbasa ikuku nke yiri nke ahụ dị ka nke otu okpomọkụ
Maka iji iko na-eme ihe

NILO Alloy 36, W.NR 1.3912, Mkpọsa 36® bụ Nickel 36® bụ Nickel 36® na-agbasasị na-agbasasị 36% nickel ma nwee ọnụego oke ikuku nke carbon steel.
Nkọwapụta 36: Nkọwa K93600, W.NR 1.3912

Aha Azụmaahịa: Nickel Alloy 36, Palr 36®, NILO 6®, Pernifer 6®
Mkpokọta 36® bụ nickel-ígwè, mgbasa ozi dị ala nke nwere 36% nickel, ọkọlọtọ 36 nwere ọdịiche dị ala site na + 500 Celsius F (260 Celsius C).
PARR 36 O O OD: 0.2-6mm, wT: 0.02-2mm

Flange bụ akụkụ nke jikọtara ọnụ abụọ na-egosi, njikọ gasket na bolt atọ jikọtara ọnụ nke njikọ ahụ nwere ike. A na-agbakwunye gasket n'etiti fanges abụọ ahụ ma jiri ya na-emechie ya. A na-akpọkwa nrụgide dị iche iche, ọkpụrụkpụ ha ji dị iche, a na-akpọkwa akụkụ nke pọmpụ, ma njikọ a bụ naanị akụkụ nke ngwakọ, dị ka njikọ dị n'etiti flange na mmiri, ọ bụghị Onepposite ị ga-akpọ mmiri gbanye mmiri dịka akụkụ ọla ọcha, ma enwere ike ịkpọ ya dị ka ụdị Flige.

Incololog 909 tube nwere ihe dị elu na-eme ka ọ dị elu ma belata ọnụ ala nke inwe. Anyị na-enye azịza ajụjụ ndị ahịa na ọganiihu na nnyefe ngwa ngwa nke ma nnukwu nnweta ma pere mpe nke Incoloy 909 tube.
Pịnye pịnye nkịtị
Tum tum tum
Achịcha
Welded tube
Hụrụ Lsaw EFW
Akwụsị Ọgwụ, Ọgwụgwụ Laut "
SITE "OD: 1 \ / 2" ~ 48 ""
Ọkpụrụkpụ: Sch5 ~ Schxxs
Ogologo: dị ka ihe ịchọrọ.

Buniloy alloy 718 na-abịakwa n'ọtụtụ akara ule, ndị okwukwe ya bụ ihe na-emegide ụdị ike nke corrosion, karịsịa na gburugburu osisi. Ngosiputa ozo bu ihe di nkpa nke bu ihe eji eme ka aru di 718, na-ewere otu igwe na usoro eji akwa igwe anaghị agba nchara.
Pịnye pịnye nkịtị
Tum tum tum
Achịcha
Welded tube
Hụrụ Lsaw EFW
Akwụsị Ọgwụ, Ọgwụgwụ Laut "
SITE "OD: 1 \ / 2" ~ 48 ""
Ọkpụrụkpụ: Sch5 ~ Schxxs
Ogologo: dị ka ihe ịchọrọ.

Dika isi ihe di nkpa nke akowa ga - acho ihe zuru ebe nile, ndi ozo na - eme ka ndi mmadu na - eme ka ihe ndi ozo di iche iche.
Pịnye pịnye nkịtị
Tum tum tum
Achịcha
Welded tube
Hụrụ Lsaw EFW
Akwụsị Ọgwụ, Ọgwụgwụ Laut "
SITE "OD: 1 \ / 2" ~ 48 ""
Ọkpụrụkpụ: Sch5 ~ Schxxs
Ogologo: dị ka ihe ịchọrọ.

E nwere ike iji ngwa na-eme ihe, na-ejikọ ya na akụrụngwa na-eme ihe, na-ejikọ ya na akụrụngwa 601, na-eme ihe na-eme ihe, osisi na-arụ ọrụ.
Pịnye pịnye nkịtị
Tum tum tum
Achịcha
Welded tube
Hụrụ Lsaw EFW
Akwụsị Ọgwụ, Ọgwụgwụ Laut "
SITE "OD: 1 \ / 2" ~ 48 ""
Ọkpụrụkpụ: Sch5 ~ Schxxs
Ogologo: dị ka ihe ịchọrọ.

Incoloy 800 bụ nickel-iron-chromium alloy. Ike mgbakọ dị elu dị elu nke alloy bụ nsonaazụ nke aluminom, carbon, na Titanium ọdịnaya. Ke adianade done, Incoloy 800 nwere ezigbo nguzogide na-eguzogide na gburugburu uto, yana oxidration na carburchiazation na gburugburu ebe obibi dị elu.
Pịnye pịnye nkịtị
Tum tum tum
Achịcha
Welded tube
Hụrụ Lsaw EFW
Akwụsị Ọgwụ, Ọgwụgwụ Laut "
Odi Odi: 1 \ / 2 "~ 48" "
Ọkpụrụkpụ: Sch5 ~ Schxxs
Ogologo: dị ka ọ chọrọ. "
Usoro na-emepụta usoro na-enwu ọkụ \ / ọrụ na-ekpo ọkụ, oyi mpịakọta
Na-emepụta ọkọlọtọ ASME B36.10 asme B36.19

Incoloy 800h pịpụtara dabere na nkọwapụta ASTM B407 na-eweta na ụdị ọrụ oyi ma ọ bụ n'ụzọ na-ekpo ọkụ. Ewezuga na ime ka ihe ndị na-akpali akpali nke nkọwapụta sb 407 adịghị mma n08810 porloy pipe, ga-enwe okpomọkụ na-emetụta okpomọkụ. Ihe ozo choro ka ekwenyero na bu SB 407 n08810 kwesiri ka anwale ọkwa ma tụọ ya site na usoro placetic.

Alloy 22 bụ nickel-base ma na-enwekarị 2% Chromium, 14% molybdenum, na 3% tungsten.
Ígwè na-erughị 3%. Alloya¡s dị oke ọdịnaya nke Chromium na-enye ya ezigbo nguzogide
Usoro mgbochi mmiri site na oxiding Media (e.G., nitric acid na nnu na cupric). Ihe dị n'ime Molybdem
Na Tungsten na-enye ọgwụ mgbochi mmiri na-ebelata mgbasa ozi (e.G., sọlfọ na hydrochloric acid). Aloi
22 Ngosipụta iguzogide ndị na-emegide ọgụ ọgụ site na mmiri nke oke osimiri n'okpuru ebe a na-asọ asọ.

Pịnye pịnye nkịtị
Tum tum tum
Achịcha
Welded tube
Hụrụ Lsaw EFW
Akwụsị Ọgwụ, Ọgwụgwụ Laut "
Odi Odi: 1 \ / 2 "~ 48" "
Ọkpụrụkpụ: Sch5 ~ Schxxs
Ogologo: dị ka ọ chọrọ. "
Usoro na-emepụta usoro na-enwu ọkụ \ / ọrụ na-ekpo ọkụ, oyi mpịakọta
Na-emepụta ọkọlọtọ ASME B36.10 Asme B36.20

A na-eme ka ọkpọ Nickel pipe 625 na-eme site na nickel-chromium-molybdem alloy alloy na mgbakwunye nke Niobium. Ike dị elu na isi ike si na-eto eto na-eto eto na 1800 f. Ezi oxidation na-eguzogide ike, na ezigbo nguzogide na ọtụtụ corrosive. Ngwa ndị a na-ahụkarị gụnyere nhazi kemịkalụ, aerosce na injinịa mmiri, akụrụngwa nchịkwa, yana ndị nukrịka.
Pịnye pịnye nkịtị
Tum tum tum
Achịcha
Welded tube
Hụrụ Lsaw EFW
Akwụsị Ọgwụ, Ọgwụgwụ Laut "
Odi Odi: 1 \ / 2 "~ 48" "
Ọkpụrụkpụ: Sch5 ~ Schxxs
Ogologo: dị ka ọ chọrọ. "
Usoro na-emepụta usoro na-enwu ọkụ \ / ọrụ na-ekpo ọkụ, oyi mpịakọta
Na-emepụta ọkọlọtọ ASME B36.10 Asme B36.20