| Salo | Na fasaha | Kayan abu | Daidaitawa | Daraja |
| Bututu mai Welded Mai Tsayi Mai Nitsewa-baka | SAW | Karfe Karfe | API 5L PSL1&PSL2 | GR.B,X42,X46,X52,X60,X65,X70, da dai sauransu |
| ASTM A252 | GR.1,GR.2, GR.3 | |||
| Saukewa: EN10210 | S275JRH, S275J0H, S355J0H, S355J2H, da dai sauransu | |||
| Saukewa: EN10219 | S275JRH, S275J0H, S355J0H, S355J2H, da dai sauransu |
Dogon Submerged-Arc Welded(LSAW) Bututu yana ɗaukar fasahar waldawar baka, ta amfani da walda mai filler, juzu'in kariyar barbashi binne baka.
LSAW shine gajartawar turanci na nutsewar baka mai walda madaidaiciya bututun karfe.The samar da tsari na submerged baka welded madaidaiciya kabu karfe bututu hada da JCOE forming fasaha, nada forming submerged baka waldi fasaha da UOE forming fasaha.
Tsarin kera bututu mai tsayin daka-baki (LSAW) shine kamar haka:
Ultrasonic farantin bincike → gefen milling → pre-lankwasawa → forming → Pre-welding → Ciki walda → waje waldi → Ultrasonic dubawa → X-ray dubawa → Fadada → na'ura mai aiki da karfin ruwa gwajin →l.Chamfering → Ultrasonic dubawa → X-ray dubawa → Magnetic barbashi dubawa a tube karshen
Karfe ba zai ƙunshi fiye da 0.050 % phosphorus ba.
Bukatun tensile
| Bukatun tensile | |||
| Darasi na 1 | Darasi na 2 | Darasi na 3 | |
| Ƙarfin ɗamara, min, psi (MPa) | 50000 (345) | 60000 (415) | 66000 (455) |
| Ƙarfin samarwa ko samarwa, min, psi(MPa) | 30000 (205) | 35000 (240) | 45000 (310) |
| Mahimmin ƙaƙƙarfan ƙaƙƙarfan ƙaƙƙarfan kauri na bango % 6 in. (7.9 mm) ko fiye: Tsawaitawa a cikin 8 in. (203.2 mm), min, % Tsawaitawa a cikin 2 in. (50.8 mm), min, % | 18 30 | 14 25 | ... 20 |
| Don kaurin bango mara ƙima ƙasa da % 6 in. (7.9 mm), cirewa daga ƙaramin ƙaƙƙarfan elongation a cikin 2 in. (50.08 mm) ga kowane Vzi - in. (0.8 mm) raguwa a kauri bango mara kyau a ƙasa %6 in. (7.9 mm), a cikin maki kashi | 1.5A | 1.25A | 1.0 A... |
Gwajin NDT(RT)
Gwajin Hydrostatic
Gwajin Injini
Gwajin Lankwasawa-isasshen tsayin bututu zai tsaya yana lanƙwasa sanyi ta 90° a kusa da madaidaicin silinda.
Gwajin ƙwanƙwasa-ko da yake ba a buƙatar gwaji, bututu zai iya cika buƙatun gwaji na lallashi.
Gwajin hydrostatic-sai dai kamar yadda aka yarda, kowane tsayin bututu za a yi shi da gwajin hydro-static ba tare da yayyo ta bangon bututu ba.
Gwajin lantarki mara lalacewa-a madadin gwajin hydro-static , za a gwada cikakken jikin kowane bututu tare da gwajin lantarki mara lalacewa.inda aka yi gwajin wutar lantarki mara lalacewa, tsayin daka za a yi masa alama da haruffa”NDE”
Gwajin ultrasonic
Gwajin halin yanzu
Bututun da aka yi oda a ƙarƙashin wannan ƙayyadaddun shine don tulin bututu wanda karfen Silinda ke aiki azaman memba mai ɗaukar kaya na dindindin, ko azaman harsashi don samar da simintin simintin-in-wuri.
| Waje Diamita | Diamita na waje na tarin bututu ba zai bambanta fiye da ± 1% daga ƙayyadadden diamita na waje ba. | ||
| Kaurin bango | Kaurin bango a kowane wuri ba zai zama fiye da 12.5% a ƙarƙashin ƙayyadadden kauri na bango ba. | ||
| Tsawon tsayi | Za a samar da tulin bututu a cikin tsayin bazuwar guda ɗaya, tsayin bazuwar ninki biyu, ko tsayi iri ɗaya kamar yadda aka ƙayyade a cikin odar siyayya, daidai da iyakoki masu zuwa: | Tsawon bazuwar guda ɗaya | 16 zuwa 25ft (4.88 zuwa 7.62mm), inci |
| Tsawon bazuwar sau biyu | Sama da 25ft (7.62m) tare da matsakaicin matsakaicin 35ft (10.67m) | ||
| Tsawon Uniform | tsayi kamar yadda aka ƙayyade tare da halattaccen bambancin ±1 in. | ||
| Nauyi | Kowane tsayin tulin bututu za a auna shi daban kuma nauyinsa ba zai bambanta fiye da 15% sama da 5% a ƙarƙashin nauyinsa ba, ana lissafta ta amfani da tsayinsa da nauyinsa kowane tsayin raka'a. | ||
