Li-tube tsa tšepe tse se nang moedi tsa Chromium molybdenum (Cr Mo) bakeng sa tšebeletso ea boiler ke thepa ea mantlha e sebelisoang liboiler tsa thuso, liboiler tsa indasteri le liontong tsa petrochemical tlas'a mocheso o phahameng le khatello e phahameng. Li ka aroloa ho latela litekanyo tse latelang tsa tekheniki.

1. Tlhophiso ka Sehlopha sa Tšepe kapa Mofuta (Tlhophiso ea Motheo)

Kereiti ea tube e se nang seamless ea Cr Mo e khetholla ka ho toba mocheso le khatello ea eona e sebetsang. Kereiti e tloaelehileng le litekanyetso tse tsamaellanang le eona li thathamisitsoe ka tlase.

Sehlopha sa Tšepe kapa Mofuta
E tloaelehileng
Dikahare tsa Cr (peresente)
Dikahare tsa Mo (peresente)
Mocheso o sebetsang oa tšepe (degree Celsius)
Tšebeliso e tloaelehileng

15CrMoG
GB/T 5310
0.80 ho isa ho 1.10
0.25 ho isa ho 0.35
ho fihlela ho 550
sehatsetsi se matla, sehatsetsi se secha, hlooho

12Cr1MoVG
GB/T 5310
0.90 ho isa ho 1.20
0.25 ho isa ho 0.35
ho fihlela ho 580
sehatsetsi se matla sa mocheso o phahameng, sehatsetsi se matla sa mocheso o phahameng

12Cr2MoG
GB/T 5310
2.00 ho isa ho 2.50
0.90 ho isa ho 1.10
ho fihlela ho 600
likarolo tsa mocheso o phahameng oa boiler tse sa totobatseng kapa tse sa totobatseng

T11 / P11
ASTM A213 /A335
1.00 ho isa ho 1.50
0.44 ho isa ho 0.65
ho fihlela ho 540
liphaephe tsa bokaholimo ba ho futhumatsa boiler (T11), lihlooho le liphaephe (P11)

T22 / P22
ASTM A213 / A335
2.00 ho isa ho 2.50
0.87 ho isa ho 1.13
ho fihlela ho 580
sehatsetsi se matla sa mocheso o phahameng, sehatsetsi se matla sa mocheso o phahameng

T91 / P91
ASTM A213 / A335
8.00 ho isa ho 9.50
0.85 ho isa ho 1.05
ho fihlela ho 650
bokaholimo ba ho futhumatsa boiler bo nang le mocheso o phahameng haholo

T92 / P92
ASTM A213 / A335
8.50 ho isa ho 9.50
0.30 ho isa ho 0.60
ho fihlela ho 650
likarolo tse hlokang matla a ho hloa a phahameng le ho feta

Ela Hloko: Ho GB/T 5310, sehlomathiso G se emetse tube ya boiler ya kgatello e phahameng. Maemong a Amerika, letoto la T (Tube) le sebediswa bakeng sa diphaephe tse nyane tsa ho futhumatsa bokahodimo ba bophara, ha letoto la P (Pipe) le sebediswa bakeng sa dihlooho tse kgolo tsa bophara le diphaephe.

2. Tlhophiso ka Boemo ba Karolo ea Boiler

Boemo ba karolo
Meputso e tloaelehileng
Mocheso o tloaelehileng oa tšepe (degree Celsius)
Litlhoko tsa bohlokoa

Phaephe ea lebota la metsi
15CrMoG, 20G
400 ho isa ho 500
khanyetso ea oxidation, matla a lekaneng a ho kheloha

Phaephe ea sehatsetsi se matla
12Cr1MoVG, T91, T92
550 ho isa ho 650
matla a babatsehang a ho halefa ha mocheso o phahameng le ho hanyetsa ho oxidation ha mouoane

Phaephe ea ho futhumatsa hape
12Cr1MoVG, T91
550 ho isa ho 600
e tšoanang le superheater empa e na le lebota le lesesaane hanyane

Phaephe ea Economizer
15CrMoG, 20G
ka tlase ho 450
ho hanyetsa ts'enyeho bakeng sa karolo e tlase ea mocheso

Sehlooho
12Cr1MoVG, P22, P91
haufi le mocheso oa mouoane
lebota le teteaneng, khanyetso ea khatello, ho tjheseletsa hantle

Liphaephe tse kholo tsa mouoane
P22, P91, P92
540 ho isa ho 620
matla a phahameng a ho thekesela, ho hanyetsa mokhathala o chesang

3. Tlhophiso ho ya ka Tsamaiso ya Tlhahiso

Leha kaofela e le lipeipi tse se nang sekoli, lipeipi tsa Cr Mo tsa boemo ba boiler li na le litlhoko tse khethehileng tsa ts'ebetso.

Ho phutholla kapa ho ntša metsi a chesang: bokgoni bo phahameng ba tlhahiso, boholo bo pharaletseng, bokaholimo bo nang le sekala sa oxide. E loketse lipeipi tsa lebota tse bophara bo mahareng ho isa ho bo boholo, tse teteaneng tse kang lihlooho le lipeipi tse kholo tsa mouoane.

Ho taka ka mokhoa o batang kapa ho phutholla ka mokhoa o batang: ho nepahala ho phahameng (ho fihlela ho plus kapa ho tlosa 0.05 mm), bokaholimo bo boreleli. E loketse lipeipi tse nyane tsa bophara, tse tšesaane tsa lebota tse kang li-superheater le li-serpentine coils tse futhumatsang hape.

Ho taka ka serame ka kalafo e matla ea mocheso: bohloeki bo phahameng ba ka hare, ha ho na sekala sa oxide. E loketse liphaephe tsa metsi a fepeloang ka khatello e phahameng le liphaephe tsa lisebelisoa tse nepahetseng.

Ka lebaka la dikahare tsa tsona tse ngata tsa alloy, ditshipi tsa Cr Mo di hloka taolo e tiileng ya mocheso wa ho futhumatsa le sekgahla sa ho fetoha ha ditshipi nakong ya ho phutholla ho chesang kapa ho ntsha ditshipi tse chesang ho qoba ho petsoha kapa sebopeho se sa tshwaneng.

4. Tlhophiso ka Bophara ba Kantle le Botenya ba Lebota

Sehlopha
Bophara ba bophara ba kantle (mm)
Botenya ba lebota (mm)
Tšebeliso e tloaelehileng

Phaephe e nyane e bophara
16 ho isa ho 89
2 ho isa ho 8
likhoele tsa serpentine tsa superheater le reheater

Phaephe e bophara bo mahareng
89 ho isa ho 219
6 ho isa ho 25
liphaephe tse theohelang tlase le tse hokahanyang

Phaephe e kholo ea bophara
219 ho isa ho 610
20 ho isa ho 60
lihlooho le liphaephe tse kholo tsa mouoane

5. Tlhophiso ho latela Maemo a Sebetsang

Mebaraka e fapaneng ya thepa e romelwang kantle ho naha e hloka ditsamaiso tse fapaneng tse tloaelehileng.

Tekanyetso ea Sechaena: GB/T 5310, limaraka tse kang 15CrMoG, 12Cr1MoVG, 12Cr2MoG.

Tekanyetso ea Amerika: ASTM A213 bakeng sa bophara bo bonyenyane, A335 bakeng sa bophara bo boholo, limaraka tse kang T11, T22, T91, P11, P22, P91.

Tekanyetso ea Europe: EN 10216-2, limaraka tse kang 13CrMo4-5, 10CrMo5-5, X10CrMoVNb9-1 (e lekanang le T91).

Tekanyetso ea Sejeremane: DIN 17175 (e nketsoe sebaka ke EN empa e ntse e sebelisoa bakeng sa merero ea khale), likereiti tse kang 13CrMo44, 10CrMo910.

Tekanyetso ea machaba: ISO 9329-2, limaraka tse tsamaellanang.

6. Tlhophiso ho ya ka Maemo a ho Romela

Boemo ba ho pepa ha lipeipi tsa Cr Mo bo ama ts'ebetso ea tsona ea tšebeletso ka kotloloho.

E tloaelehileng le e hatelitsoeng (N hammoho le T): ho tloaeleha ho lateloa ke ho hatelloa ha mocheso o phahameng. E sebelisoa bakeng sa lipeipi tse ngata tsa Cr Mo tse kang 15CrMoG le 12Cr1MoVG.

E tloaelehileng (N): e tloaelehileng feela. E sebelisoa bakeng sa lits'ebetso moo litlhoko tsa tšusumetso e tlase ea mocheso li seng tsa bohlokoa.

E timiloe le ho hatsetsoa (Q hammoho le T): ho tima ho lateloa ke ho hatsetsoa. ​​E sebelisoa bakeng sa matla a phahameng le litlhoko tse phahameng tsa ho tiea, mohlala tse ling tsa T91 le P91.

Tharollo e phekotsoeng (S): e futhumatsoa mochesong o phahameng ebe e pholisoa ka potlako. E sebelisoa bakeng sa lipeipi tsa Cr Mo tse sa hloekang tsa austenitic tse kang TP347H (e na le Cr empa e seng tšepe e tloaelehileng ea Cr Mo).