Lukluk long ol samting
ASTM A335 Gret P5 em i wanpela 'ferritic chromium-molybdenum alloy steel' paip we ol i wokim bilong yusim 'elevated-tempereture' na presa-bearing sevis. Wantaim 'chromium' insait long 4-6% na 'molybdenum' klostu long 0.45-0.65%, P5 i save givim gutpela kombinesen bilong 'oxidation resistance', 'creep strength', na 'weldability'. Dispela i mekim em i kamap gutpela samting bilong ol boila na stim lain, rifaineri hita paip, rifoma na hot proses lain we kabon stiel bai skel hariap tumas o lusim strong bilong en. Taim ol i givim long 'normalized' na 'tempered' kondisen, P5 i save holim strong 'dimensional stability' na 'mechanical reliability' longpela taim bilong wok.
Kemikel Komposesen (olsem, %)
| Elemen | Kenten (%) | Wok |
|---|---|---|
| Kabon (C) | Liklik o wankain olsem 0.15 | I givim strong, i stap daunbilo long weldim |
| Manganese (Mn) | 0.30–0.60 | Deoksidesen, i helpim wok long hat |
| Silikon (Si) | 0.50–1.00 | Sapotim oksidesen resistens |
| Chromium (Cr) | 4.00–6.00 | Hai-temperature skel na korosen resistans |
| Molybdenum (Mo) | 0.45–0.65 | Strong bilong kru na bruk |
| Fosforas (P) | Liklik o wankain olsem 0.025 | I holim strong |
| Salfa (S) | Liklik o wankain olsem 0.025 | Gutpela wok bilong masin/strong |
| Nikel (Ni) | Liklik o wankain olsem 0.50 | Sampela midia i strong moa |
| Kopa (Cu) | Liklik o wankain olsem 0.40 | Moa proteksen long oksidesen |
| V, Nb | Liklik o wankain olsem 0.02 wanwan | Wok bilong klinim ol wit samting, strong bilong 'creep' |
Dispela 'alloy balance' i daunbilo long P22/P91, olsem na em i isi long weldim na long PWHT, tasol em i givim gutpela 'oxidation control' winim ol 'lower-Cr greds.
Ol samting bilong masin
| Banis | Rikwaemen | As tingting |
|---|---|---|
| Strong bilong holim | Bikpela o wankain olsem 415 MPa (60 ksi) | Em i no inap bruk aninit long hevi |
| Strong bilong givim | Bikpela o wankain olsem 205 MPa (30 ksi) | Em i no inap senis oltaim |
| Longpela | Bikpela o wankain olsem 30% | I larim wok bilong wokim na wokim |
| Hatnes | Liklik o wankain olsem 163 HBW | I holim strongpela na weld kompatibiliti |
Ol dispela veliu i stret wantaim 'normalized-na-tempered delivery condition we ASTM A335 i laikim.
Wok bilong wokim na hat tritmen
P5 i mas kamap na hat-tritim gut long mekim wok bilong en longpela taim long tempereja. Octal Pipe i yusim wanpela gutpela rot we i stat long ol klinpela Cr-Mo billets. Ol i save hatim ol 'billet' na sutim ol long kamapim ol hul, na bihain ol i save rolim o kol-pulim i go long ausait diamita na wol tiknes. Bihain long ol i wokim, ol i save mekim ol paip i kamap wankain long 900-950 digri long stretim 'ferritic matrix', rausim ol 'non-uniform carbides' na rausim ol hevi. Wanpela step bilong mekim 'tempering' i kamap long 675-750 digri i save kamapim bek 'ductility' na stretim wanpela 'tempered ferrite-carbide' straksa. Dispela tu-stej 'thermal cycle' em i samting we i givim P5 'creep resistance' na 'oxidation stability' taim em i wok.
Bihain long hat tritmen, ol i save mekim 'hydrostatic' tes long olgeta wan wan paip, 'dimensional inspection' na 'non-' non-destructive eksaminesen (ultrasonik o 'eddy current' olsem ol i tok). Ol i save saplaim ol paip long nomol na tempered kondisen wantaim ful hat trasebiliti (EN 10204 3.1 o 3.2), we em i bikpela samting long ol pawa na rifaineri projek.
Dimensional Range
| Paramita | Namba / Ditel |
|---|---|
| Ausait Diamita | 12.7–610 mm (1⁄2–24 in) |
| Tiknes bilong banis | 1.2–100 mm, incl. SCH 10–SCH 160 |
| Longpela | Inap long 12 mita (SRL / DRL / katim-long-longpela) |
| End Type | Ol i wokim long 'welding' o 'plain end' |
| OD Tolerans | Planti taim ±1% (long ASTM A999 o agrimen) |
| WT Tolerans | Planti taim ±10% |
| Stretpela | Planti taim liklik o wankain olsem 0.8 mm long wan wan m |
Dispela mak i karamapim ol 'medium-bore steam lines' na ol bikpela 'refinary/chemical process headers'.
Hai-Pefomens bilong Tempereja
Long ol sevis tempereja inap long 565 digri (1050 digri F), P5 i kamapim wanpela liklik 'chromium-rich oxide we i save daunim 'scaling' na 'metal loss'. Bikos 'molybdenum' i save strongim 'ferritic matrix', 'creep deformation' i save kamap isi isi moa long 'plain carbon steel'. Dispela 'tempered microstructure' i helpim tu long sakim 'thermal cycling' na bagarap bilong pes, olsem na ol 'heat transfer surfaces' na 'wall thickness' i stap gut long taim bilong sekim. Long ol aplikesen we i nidim bikpela tempereja o bikpela stres, ol enjinia i ken muv i go long P11 o P22, tasol long oksidesen-kritikal, namel-temperature sevis, P5 em i gutpela rot bilong makim.
Ol aplikesen
Pawa na boiler sistem: stim lain, boiler het, supahita na rihita koil insait long namel tempereja ben
Ol 'refining' na 'petrochemical units': 'furnace' na 'reformer paiping', 'hot transfer lines', 'flare' na 'relief headers'
Ol kemikel na fetilaisa plent: ol hai-temperature hit eksenja, reakta na proses manifold
Ol samting bilong wokim oil na ges: stim injeksen na hot proses lain we Cr-Mo paip i stap
Skelim wantaim ol Komon Cr-Mo Gret
| Gret | Cr (%) | Mo (%) | Pasin bilong sevis |
|---|---|---|---|
| P5 | 4.0–6.0 | 0.45–0.65 | Gutpela 'oxidation resistance' long namel -hai tempereja, gutpela 'weldability' |
| P11 | ~1–1.5 | ~0.5 | Jeneral stim/boila paip we strong na 'ductility' i mas stap wankain |
| P22 | ~2–2.5 | ~1 | Ol kondisen bilong supahita/rihita we i hat moa na i nidim bikpela 'creep/rupture resistance' |
Dispela i helpim ol projek enjinia long makim stretpela aloi taim ol i larim sampela ASTM A335 gret.
Inspeksen na Testing
Octal Pipe i save mekim ol tes bihainim ol lo bilong ASTM A335 na ASTM A999. Dispela i gat 'hydrostatic' tes, NDT bilong bodi na arere bilong paip, 'tensile' na 'hardness verification', na 'flattening/flaring' tes long konfemim 'ductility'. Ol i ken putim 'impact' o 'radiographic testing' taim projek spesifikasen i singaut long wanpela bikpela inspeksen klas. Olgeta tes risal i stap insait long ol setifiket bilong tes bilong mil na ol i makim ol paip bilong luksave gut.
Bilong wanem Oktal Paip
Saplaim trupela ASTM/ASME A335 P5 paip we i no gat 'seam' na i stap gut na i no hat tumas
Ol ful dimensen, mekanik na NDT rekot we i gutpela long pawa, rifaineri na kemikel projek
Ekspot-redi paking, pinis proteksen na mak
Inap long saplaim ol gret klostu (P11, P22) bilong ol paiplain na boiler sistem wantaim ol narapela narapela tempereja zon
Konten na spesifikasen ol i raitim long wanpela prodak-pastaim, teknikel stail we i gutpela long web pablising na sekim indeksing
FAQ
Q1: Ol i save yusim ASTM A335 P5 paip long wanem samting?
Q2: "5Cr-0.5Mo" i minim wanem long P5 chrome moly pipe?
Q3: Wanem em i 'welded-pipe i wankain olsem ASTM A335 P5?
Q4: Hau bai mi makim P5 vs P9 vs P11 vs P22?
Ol setifikesen
CE Setifiket
ISO 9001 Setifiket
API Q1 Setifiket
ABS Setifiket
AP-5L Setifiket
API-5CT Setifiket
