Welded yeeb nkab yog cov yeeb nkab steel uas tsim los ntawm kev ua cov hlau phaj hlau los yog sawb rau hauv cov duab cylindrical thiab koom nrog cov npoo los ntawm cov txheej txheem vuam. Lub ntsiab welded yeeb nkab hom muaj xws liERW (Electric Resistance Welded), EFW (Electric Fusion Welded), thiab SAW (Submerged Arc Welded). Carbon steel welded kav yog dav siv rau roj & roj pipelines. Stainless hlau thiab npib tsib xee alloy welded kav yog nyiam rau tshuaj, offshore, thiab siab -corrosion ib puag ncig.

 

ERW EEW SAW Steel Pipe

Txheej txheem	Weld Hom	Filler Hlau	Hom OD Range	Phab ntsa Thickness	Cov qauv tseem ceeb
ERW (Electric Resistance Welded)	Forge weld (khoom-state)	Tsis muaj	1/2 "-24" (21.3-610 hli)	1.2-20 hli	ASTM A53, A312, API 5L
EFW / EEW (Electric Fusion Welded)	Fusion weld (melt + solidify)	Yog (hlau + flux)	8"-120"+ (219-{4}} hli)	6-60 hli +	ASTM A358, A671, B619, A928
SAW (Submerged Arc Welded) - LSAW & SSAW	Fusion weld, submerged arc	Yog (hlau + flux)	16"-120"+ (406-{4}} hli)	6–{1}} hli	API 5L, ASTM A358, DNV

 

 

A welded cevyog cov yeeb nkab steel uas tsim los ntawm kev tsim cov phaj hlau tiaj tus los yog sawb rau hauv cov duab cylindrical thiab koom nrog cov npoo los ntawm cov txheej txheem vuam.

 

Tsis zoo li cov yeeb nkab seamless, uas yog tsim los ntawm cov khoom siv hlau uas tsis muaj vuam seam, welded yeeb nkab muaj qhov ntev los yog kauv vuam sib txuas. Cov thev naus laus zis vuam niaj hnub, kev tshuaj xyuas, thiab cov txheej txheem kho cua sov tso cai rau cov kav dej kom ua tiav lub zog zoo, tiv thaiv corrosion, thiab kev ntseeg siab rau ntau daim ntawv thov kev lag luam.

 

Welded kav yog dav siv nyob rau hauv:

• Roj thiab roj pipelines
• Tshuaj ua cov nroj tsuag
• Kev tsim hluav taws xob
• Offshore platforms
• Kub exchangers
• Kev kho dej
• Desalination nroj tsuag

Hu rau tam sim no

 

ERW EFW thiab SAW

Electric Resistance Vuam (ERW), Hluav Taws Xob Fusion Vuam (EFW), lossis Submerged Arc Vuam (SAW).

• ERW - los ntawm qhov deb tshaj plaws - siv siab - zaus tam sim no rau forge-weld seam yam tsis muaj cov hlau muab tub lim, ua yeeb nkab mus txog 24 ntiv NPS hauv qib carbon thiab stainless hlau.
• EFW thiab SAW yog cov txheej txheem fusion uas siv cov hlau muab tub lim thiab flux shielding kom ua tiav qhov sib sib zog nqus- nkag mus rau hauv qhov loj - txoj kab uas hla, tuab- phab ntsa yeeb nkab mus txog 120 ntiv tes, suav nrog cov nickel alloys xws li Hastelloy C276 thiab Inconel 625.

 

 

ERW cevyog forge weld - tsis muaj cov hlau muab tub lim, cua sov tsim los ntawm siab - zaus hluav taws xob tsis kam. Qhov zoo tshaj plaws rau me me - txog - nruab nrab txoj kab uas hla (txog NPS 24 "), nruab nrab - mus rau - cov phab ntsa nyias, thiab cov kev pabcuam dav dav hauv cov pa roj carbon thiab stainless hlau.

 

ERW Steel Yeeb Nkab Manufacturing txheej txheem

Hlau Sawb
↓
Yob txoj kev
↓
Tube Shape
↓
Hluav taws xob tam sim no
↓
Resistance Thaum tshav kub kub
↓
Weld Seam

 

ERW Yeeb Nkab Cov Khoom Siv

Khoom siv	Cov Qib Siab
Carbon Steel	ASTM A53 Gr.B, API 5L Gr.B, X42, X52
Stainless hlau	TP304, TP316, TP316L
Tsawg Alloy Steel	A335 P11 / P22 (limited welded daim ntaub ntawv)

 

Qhov zoo:

✅ Ntau lawm efficiency
✅ Tus nqi qis
✅ Siab qhov tseeb
✅ Haum rau kev tsim khoom loj

Qhov tsis zoo:
Muaj peev xwm txwv rau cov phab ntsa tuab
Muaj peev xwm txwv rau cov kab loj loj (piv rau SAW)

 

 

EFW/EEW (Electric Fusion Welding) yog qhov dav dav uas suav nrog SAW, GTAW, thiab GMAW. EFW yeeb nkab yog tsim los ntawm vuam steel phaj siv fusion vuam tshuab.

 

EFW Manufacturing txheej txheem

Hlau Phaj
↓
Phaj Rolling
↓
Ntug Kev Npaj
↓
Arc Vuam
↓
Internal & External Vuam
↓
Kev kho cua sov
↓
NDT Test

 

EFW Yeeb Nkab Vuam Txoj Kev

Vuam txoj kev	Lub Npe	Daim ntawv thov
GTAW	Gas Tungsten Arc Vuam	Hauv paus dhau
SAW	Submerged Arc Vuam	Muab cov khaubncaws sab nraud povtseg
Combination GTAW + SAW	High quality welded yeeb nkab	Stainless / Nickel alloys

 

EFW feem ntau yog siv rau:

• Stainless hlau yeeb nkab
• Duplex stainless hlau yeeb nkab
• Nickel alloy yeeb nkab
• Loj txoj kab uas hla

 

EFW Features:

✅ Muaj peev xwm ua tau loj - cov kav dej
✅ phab ntsa siab -thickness muaj peev xwm
✅ Haum rau cov alloys tshwj xeeb

 

 

SAW cev(LSAW thiab SSAW) yog fusion weld nrog muab tub lim hlau thiab granular flux shielding. Nws dominates loj - txoj kab uas hla, tuab- phab ntsa, siab - kev siv siab nrog rau ntev - cov roj thiab roj trunklines.

LSAW	Longitudinal Submerged Arc Welded
SSAW	Spiral Submerged Arc Welded

 

SAW Pipe Applications

API 5L: X52, X60, X65, X70

 

 

LSAW vs SSAW Steel Pipe

Yam ntxwv	LSAW Pipe (SAW)	SSAW Pipe (SAW)
Vuam Txoj Cai	Arc nyob rau hauv flux, ID ces OD pass (fusion)	Arc nyob rau hauv flux, kauv seam (fusion)
Filler Hlau	Yog - engineered hlau + flux	Yog - engineered hlau + flux
OD Ntau	16 "-64" (406-1626 hli)	8"-140"+ (219-{4}} hli)
Phab ntsa Thickness	6mm-60mm +	6mm-50 hli
Weld Ntev	1 × yeeb nkab ntev (ncaj seam)	1.5-3 × yeeb nkab ntev (kauv)
Weld Joint Efficiency	0.85–1.00 (Qib 1 nrog 100% RT)	0.85 (ntev)
NDE Method	100% RT (Class 1); UT + hydrotest	UT ntawm seam; RT ntawm tie-ins
Nto tiav	Pom sab hauv / sab nraud weld hlaws	Visible kauv weld hlaws
Dimensional raug	Zoo - nias- tsim, txoj kab uas hla- nthuav dav	Zoo - ntau ovality variation
Tus nqi txheeb ze	Siab tshaj	Nruab nrab-ntau yam rau OD loj

 

ERW vs EFW vs SAW

Yam khoom	ERW Tube	EFW tub	SAW Pipe
Lub Npe	Electric Resistance Welded Yeeb Nkab	Electric Fusion Welded Yeeb Nkab	Submerged Arc Welded Yeeb Nkab
Vuam Txoj Cai	Resistance cua sov + siab vuam	Arc melting + fusion vuam	Arc vuam nyob rau hauv flux txheej
Kev taw qhia vuam	Ntev	Ntev	Longitudinal (LSAW) / Kauv (SSAW)
Raw Khoom	Hlau kauj	Hlau phaj	Hlau phaj los yog coil
Txoj kab uas hla	1/2 "-24" typical	16"–60"+	16"–120"+
Phab ntsa Thickness	1.5-25 hli	6-60 hli	6–{1}} hli
Tus nqi tsim khoom	Tsawg	Nruab nrab -High	Nruab nrab
NDT Requirements	UT, Eddy tam sim no, Hydro test	RT/UT feem ntau xav tau	RT/UT feem ntau xav tau
Cov ntaub ntawv zoo tshaj plaws	Carbon steel, stainless hlau	Stainless, duplex, npib tsib xee alloys	Carbon steel, qis alloy steel

 

Common Welded Pipes Hom

• Stainless hlau welded yeeb nkab
• 904L welded yeeb nkab
• 254 SMO welded yeeb nkab
• Duplex 2205 Welded yeeb nkab
• Super Duplex 2507 Welded Yeeb Nkab
• Hastelloy C276 welded yeeb nkab
• Incoloy 825 welded yeeb nkab

 

 

TIG Welding (GTAW) - Tungsten Inert Gas Vuam

Txheej txheem: Tungsten electrode, argon shielding. Feem ntau ua haujlwm: TIG root pass + SAW sau pass. TIG welding muab zoo heev weld zoo thiab feem ntau siv rau:

• Stainless hlau welded kav
• Duplex welded kav
• Nickel alloy welded kav

 

MIG=Hlau Inert Gas Vuam

Siv nruam vuam hlau raws li cov electrode; welding precision yog qis dua TIG.
Daim ntawv thov:
Carbon steel fabrication
Stainless hlau fabrication
Tube spool fabrication

 

Plasma Welding (PAW)

Plasma welding muaj:

High vuam ceev

Qhov tob tob

ruaj khov weld zoo

 

SAW Welding (Submerged Arc Vuam)

SAW feem ntau yog siv rau:

Cov kav dej loj

Cov kav dej tuab

Heavy industrial applications

 

TIG Welding vs MIG Vuam

MIG vuam siv cov khoom siv hluav taws xob tsis tu ncua thiab cov roj tsis muaj zog tiv thaiv, ua rau cov vuam nrawm thiab ntau yam. Thaum lub arc raug ntaus, cov hlau melts thiab fuses nrog lub hauv paus hlau los tsim cov weld. Ib txhij, shielding roj (feem ntau yog sib xyaw ntawm argon thiab carbon dioxide rau steel vuam) ntws los ntawm cov phom vuam los tiv thaiv lub pas dej molten weld los ntawm kev sib kis los ntawm oxygen thiab nitrogen.

TIG vuam siv cov khoom siv tsis yog -tungsten electrode thiab ntshiab argon raws li cov roj tiv thaiv; tus welder manually ntxiv cov xaim xaim rau lub pas dej ua ke raws li qhov xav tau, tso cai rau kev tswj xyuas ntau dua ntawm cov txheej txheem vuam thiab ua kom huv welds.

 

 

ERW / EFW / SAW=yeeb nkab raug vuam txheej txheem

TIG / MIG / SMAW=cov txheej txheem vuam siv thaum tsim khoom

 

 

Kev ntsuas hluav taws xob (RT)

Siv los txheeb xyuas:

• Weld tawg
• Tsis muaj fusion
• Internal tsis xws luag

 

Kev kuaj ultrasonic (UT)

Siv rau:

• Weld integrity soj ntsuam
• Internal flaw detection

 

Eddy Kev Xeem Tam Sim No

Siv feem ntau rau: Stainless hlau tubing tshuaj xyuas

 

Kev Ntsuas Hydrostatic

Hydro kuaj xyuas:

• Siab tsis kam
• Leak nruj
• Weld kev ntseeg tau

 

Kev Ntsuas PMI

PMI txheeb xyuas:

• Nickel cov ntsiab lus
• Chromium cov ntsiab lus
• Alloy muaj pes tsawg leeg

 

Welded yeeb nkab vs Seamless yeeb nkab

Yam khoom	Welded yeeb nkab	Seamless Yeeb Nkab
Txoj kev tsim khoom	Phaj / coil forming + vuam	Extrusion los ntawm cov hlau nplaum
Weld Seam	Yog lawm	Tsis muaj
Ntau lawm ceev	Ceev dua	qeeb
Loj Loj Muaj peev xwm	Zoo heev	txwv
Nqi	Kev lag luam ntau dua	Siab dua
Muaj	Zoo dua rau qhov loj me	Qhov ntau thiab tsawg
Nto Zoo	Zoo heev	Zoo heev

 

Vim li cas thiaj xaiv Welded Yeeb Nkab Hloov Seamless Yeeb Nkab?

1. Yuav tsum muaj txoj kab uas hla loj

Rau cov diameters saum toj no qee qhov ntau thiab tsawg, welded yeeb nkab muab kev muaj zoo dua thiab cov nqi tsim khoom qis dua.

 

2. Cov nqi siv tau zoo

Welded kav feem ntau muaj:

Txo cov khoom pov tseg

Kev tsim khoom sai dua

Cov nqi sib tw zoo dua

 

3. Cov Alloys tshwj xeeb xav tau

Loj txoj kab uas hla nickel alloy kav feem ntau siv tau los ua cov kav dej welded.

 

 

1. Tswj cov cua kub nkag

Cov cua kub ntau dhau tuaj yeem ua rau: Cov qoob loo loj hlob; Poob ntawm corrosion kuj; Distortion
Pom zoo:
Tswj vuam kub input: 0.5-2.0 kJ / mm (nyob ntawm alloy)

 

2. Siv cov hlau ua kom raug

Khoom siv hauv paus	Pom zoo Filler
316L	Qauv: ER316L
TIAB SA 2205	TIAB SA 2209
Super Duplex 2507	TIAB SA 2594
Ib 625	ERNiCrMo-3
Hastelloy C276	ERNiCrMo-4

 

3. Tsis txhob ua yuam kev ntawm kev sib tsoo

Teeb meem	Ua rau	Kev daws
Kev tawg	Tsis yog muab tub lim	Siv cov muab tub lim sib phim
Porosity	Tsis zoo shielding gas	Txhim kho kev tiv thaiv roj
Weld corrosion	Tsis muaj passivation	Pickle / passivate
Distortion	Tshaj kub	Tswj ib ntus

 

Kev txiav txim siab vuam

Welded kav feem ntau muaj kev ntxhov siab nyob ntawm qhov ntev los yog kauv weld seam. Rau cov ntawv thov tseem ceeb, tom qab-weld heat treatment (PWHT) yog qhov yuav tsum tau ua kom tshem tawm cov microstructural hardening nyob rau hauv tshav kub- cuam tshuam cheeb tsam (HAZ). Thaum koom nrog cov qib stainless hlau, qis- cov txheej txheem cua sov input vuam yuav tsum tau siv los tiv thaiv chromium carbide nag lossis daus, uas ua rau muaj kev cuam tshuam ntawm intergranular.

 

API 5L ERW Yeeb Nkab rau Roj Pipeline System

Crude roj sib sau ua ke pipeline
Cov xwm txheej ua haujlwm:

Kev Pab Cuam Nruab Nrab	Cov roj ntsha
Kub	60 degree
Siab	4-8 MPa
Txoj kab uas hla	NPE 12
Ntev	35km ua

 

Vim li cas API 5L X52 ERW Pipe

• Kev xav tau siab
• Yuav tsum muaj ntau npaum li cas
• Tus nqi -sensitive project
• Txhim khu kev qha niaj hnub ERW kev tsim khoom muaj

 

ASTM A358 TP316L EFW Yeeb Nkab rau Tshuaj Cog

Chemical processing plant

Kub	120 degree
Siab	1.6 MPa siab
Yeeb Nkab Loj	DN 600 Nws

 

ASTM A358 TP316L EFW welded yeeb nkab

Yog vim li cas:

• Loj txoj kab uas hla
• Stainless hlau corrosion kuj
• Muaj zoo dua piv nrog seamless yeeb nkab

 

Super Duplex 2507 Welded Yeeb Nkab rau Offshore Platform

Offshore seawater txias system:

Nruab nrab	Dej hiav txwv
Kub	35 degree
Cov ntsiab lus chloride	Siab
Siab	3 MPa ua

 

UNS S32750 Super Duplex 2507 Welded Yeeb Nkab

Qhov zoo:

• PREN >40
• Cov tshuaj chloride zoo heev
• Lub zog siab tshaj 316L

 

 

"Puas yog ERW yeeb nkab muaj kev nyab xeeb rau siab - cov ntawv thov siab?"

Niaj hnub nimno ERW yeeb nkab tuaj yeem txhim khu kev qha yog tsim raws li: API 5L, ASTM A53, ISO qauv
Yuav tsum tau soj ntsuam: Ultrasonic weld soj ntsuam; Eddy kev sim tam sim no; Kev ntsuam xyuas hydrostatic

Rau: Boiler piping, siab heev, Cyclic qaug zog; Seamless yeeb nkab tseem yog qhov kev xaiv zoo dua.

 

"Puas welded yeeb nkab ib txwm tsis ua hauj lwm ntawm lub weld seam?"

Tsis yog. Lub vuam nws tus kheej tsis yog qhov tsis muaj zog tshaj plaws.

Niaj hnub nimno welded kav feem ntau ua tsis tau vim:

• Kev xaiv khoom tsis raug
• Sab nraud corrosion
• Kev teeb tsa tsis zoo
• Kev siv tsis zoo welding thaum lub sij hawm ua teb

 

"Vim li cas stainless welded yeeb nkab kim dua carbon steel?"

Vim tias stainless hlau muaj: Chromium, Nickel, Molybdenum. Cov khoom no muab kev tiv thaiv corrosion tab sis nce nqi.

 

"Dab tsi yog qhov txawv ntawm ERW, LSAW, thiab SSAW welded kav?"

ERW (High-Frequency Electric Resistance Welded) yeeb nkab yog tsim los ntawm kev tiv thaiv cua sov thiab cov neeg kho tshuab siab, featuring ib tug longitudinal weld seam; nws tsim nyog rau qis-rau- nruab nrab siab, me me- mus rau - nruab nrab diameters, thiab kev siv cov qauv. LSAW (Longitudinal Submerged Arc Welded) thiab SSAW (Spiral Submerged Arc Welded) kav siv cov txheej txheem submerged arc vuam.

Qhov sib txawv yog raws li nram no:

• LSAW nta lub seam ntev, muaj kev kub siab heev -cov kabmob muaj peev xwm thiab cov phab ntsa tuab, thiab feem ntau yog siv rau ntev - cov roj thiab cov kav xa hluav taws xob.
• SSAW nta ib txoj hlua khi, muab ntau dua qhov yooj yim thiab tus nqi -kev ua tau zoo, thiab siv dav hauv cov dej txuag dej thiab cov hauv paus hauv paus.

 

"Yuav ua li cas ERW yeeb nkab hloov tau seamless yeeb nkab nyob rau hauv siab - cov ntawv thov siab?"

Nws hloov tsis tau tag nrho. Txawm hais tias niaj hnub siab - zaus ERW kev tsim cov txheej txheem thiab tsis yog -kev kuaj kev puas tsuaj (NDT) thev naus laus zis tau ua kom muaj zog vuam zoo. Seamless yeeb nkab tseem yog qhov kev xaiv tseem ceeb rau kev ua haujlwm siab heev -siab lossis corrosive heev.

 

Carbon Steel Dej los yog Roj Kab Kev Ntsuam Xyuas Tsis Zoo

Ib hom kev ua tsis tiav hauv welded carbon steel dej los yog roj kab yog nyob rau hauv pitting nyob rau hauv lub weld cag vim tsis txaus nkag los yog slag suav nrog. Hauv cov tshuaj chloride- hnyav ib puag ncig, tus qauv austenitic welded kav (xws li 304) yog qhov ua rau muaj kev ntxhov siab corrosion tawg (SCC). Kev kho dua tshiab rau duplex stainless hlau (xws li 2205) lossis npib tsib xee-raws li alloys txo qhov kev pheej hmoo no.

 

Cov qauv

• ASTM A 312 Cov Lus QhiaStainless hlau welded yeeb nkab
• ASTM A790 Cov Lus Qhia Tshwj XeebDuplex stainless hlau yeeb nkab
• ASTM A928 Cov Lus Qhia Tshwj XeebDuplex welded yeeb nkab nrog muab tub lim hlau
• ASTM B619 Cov khoom lag luamNickel alloy welded yeeb nkab
• API 5LKev siv cov kav dej

 

 

Q: Puas yog welded yeeb nkab tsis muaj zog dua seamless yeeb nkab?

A: Tsis tas li. Niaj hnub nimno welded kav tsim nrog cov txheej txheem vuam tsim nyog thiab kev soj ntsuam tiav tuaj yeem muab kev ua haujlwm zoo heev.

 

Q: Qhov txawv ntawm ERW thiab EFW yeeb nkab yog dab tsi?

A: ERW siv hluav taws xob tiv thaiv cua sov, thaum EFW siv fusion vuam qhov twg cov hlau yog yaj thiab koom nrog.

 

Q: Dab tsi yog cov khoom siv zoo tshaj plaws rau cov kav dej hiav txwv?

A: Super Duplex 2507 thiab 254 SMO feem ntau xaiv vim lawv cov tshuaj chloride corrosion kuj zoo heev.

 

Q: Dab tsi yog qhov txawv ntawm ERW thiab SAW welded kav?

A: ERW kav dej siv siab - zaus hluav taws xob tam sim no los ua cua sov thiab siab- khi cov seam, zoo tshaj plaws rau cov kab me me (txog 24 ntiv tes). SAW cov kav dej siv cov hluav taws xob arc hauv qab ib daim pam ntawm cov dej ntws los ua cov hlau nplaum, ua rau lawv zoo tagnrho rau hnyav- phab ntsa thiab loj - txoj kab uas hla (16 ntiv tes thiab siab dua).

 

Q: Ua li cas cov txheej txheem vuam cuam tshuam rau corrosion kuj ntawm stainless hlau kav?

A: Cov cua sov- cuam tshuam cheeb tsam (HAZ) thaum lub sij hawm vuam tuaj yeem hloov kho microstructure yog tias cov cua txias tsis raug. Kev tswj xyuas cov roj shielding kom zoo thiab tom qab-weld pickling/passivation yuav tsum tau rov qab ua kom muaj kev tiv thaiv corrosion.

 

Q: Qhov twg welded yeeb nkab yog qhov zoo tshaj plaws rau cov roj thiab cov kav dej?

A: API 5L ERW thiab LSAW kav feem ntau siv. Kev xaiv nyob ntawm txoj kab uas hla, siab, thiab qhov project specifications.

 

Q: Kev tshuaj xyuas dab tsi yuav tsum tau ua rau welded yeeb nkab?

A: Cov kev tshuaj ntsuam xyuas muaj xws li:

Kev ntsuam xyuas hydrostatic

Kev kuaj ultrasonic

Kev kuaj hluav taws xob

Dimensional soj ntsuam

Kev ntsuas PMI rau alloys

 

Hais txog Zhengzhou Huitong Pipeline Equipment Co., LTD.

HT PIPE yog ib tug zoo-paub stockist thiab exporter. Peb yog cov khoom siv stainless / carbon / npib tsib xee alloy khoom xa khoom nrog 15+ kev xa tawm. Peb tsis tsuas yog muab cov kav dej, phaj, puag ncig, tab sis kuj yog cov yeeb nkab fittings, flanges, thiab lwm yam. Tiv tauj peb kom paub ntau ntxiv thiab cov nqi dawb.

 

✅ ISO 9001: 2015

✅ MTC 10204 3.1 3.2

✅ 100% PMI (Positive Material Identification)

✅ Ultrasonic Testing (Rau ASME VIII)

✅ Thib peb-Kev Tshawb Fawb (SGS/BV/DNV/LR)

✅ NACE MR0175 / ISO 15156

 

Author: Chloe Pu

5+ Xyoo ntawm Kev Tshaj Lij Tshaj Plaws hauv Stainless Hlau, Nickel Alloy & Carbon Steel Hlau Kev Lag Luam

Hloov tshiab kawg: Lub Xya hli ntuj 21, 2026 (Beijing Sijhawm)