Welding Roll Clad Plates

8/3/2019 Welding Roll Clad Plates

1/20

1 | Manfred Hfer | Welding of X80/100 I April , 2011 1

We are the World of Welding Solutions.

Welding of roll-bondedclad plates

with focus on 625

MANFRED HOEFER,Technical Regional Manager

ME, April 2011


2/20

2 | Manfred Hfer | Welding of X80/100 I April , 2011

Roll-bonded clad plates


3/20




4/20




5/20




6/20




7/20




8/20




9/20



joint designs

Access from both sides Access from one side


10/20


Roll-bonded clad plates Welding processes-joint designs


11/20


NiCr22Mo9Nb

NiCr22Mo9Nb

20 25 5 Cu L

NiCr22Mo9Nb

NiCr20Mn3Nb

EN

Nibas 625 IG/FOXENiCrMo-3E Ni 6625ERNiCrMo-32.4856Alloy 625


CN20/25 M IG/FOXE385E 20 25CuNLER3851.4539Alloy 904L


Nibas 70/20 IG/FOXENiCrFe-3E Ni 6082ERNiCr-32.4816Alloy 600

AWSENAWS

Bohler

Brand

Subsequent layersBufferMulti pass GTAW+SMAWEN

Material

Number

Alloytype

Consumable typeCladding type

Welding consumables according tocladding materials


12/20


Welding technologies


13/20


Principal of joint welding of cladded pipes

Thicknessmm

GTAW - root

Joint preparation Welding

1. GTAW- weldingof the cladding

2. Joining with

Overalloyed

Filler metals

r = according tothe process

Weldable onlyfrom one side


14/20


WPS for cladded pipes


15/20


SHAH Gas Development

Pipeline welding of CRA clad pipesLocation: Habshan, Abu Dhabi

Welding of CRA clad steels may be performed in one of two sequences.

When the back side of the weld is accessible, a carbon steel to carbon

steel weld shall be made first with carbon steel weld materials. Then theback side of the weld shall be weld overlayed with Corrosion ResistantAlloy in compliance with Weld Overlay Specification RP-710-95-003.

When the back side of the weld is inaccessible, the entire weld shall bemade from one side using weld materials of UNS N06625 composition

such as ERNiCrMo-3 and ENiCrMo-3 welding materials. When the backside of the weld is inaccessible, the root pass shall be made with the GasTungsten Arc welding process including back purging with inert gas.Back purging shall be maintained through completion of the root passand hot pass or until 6 mm weld thickness is deposited, whichever isgreater.



16/20


SHAH Gas DevelopmentPipeline welding of CRA clad pipes

Location: Habshan, Abu Dhabi


16 dia x 11.2mm wt API 5L X60 with 3mm clad24 dia x 16.0mm wt API 5L X60 with 3mm clad

Hardness for Carbon steel : 248 HV 10.Average length: 12M long; beveled to 30 deg -0 deg and +5 deg.Manufactured as per API 5LD 2nd edition, 1998., SAW Line pipe.

UNS N06625 Metallurgical clad CRA Layer


17/20


Welding test with unalloyed SMAW electrodeson Ni-base weld metal of type ENiCrMo-3

Influence on chemical composition, hardness and microstructure


18/20


Bending test results

M:2,5:1

Bending test from cross-section

of weld deposited cladding withunalloyed SMAW electrodes onNi-base weld metal of type ENicrMo-3

Result: 180bending angle with several cracksin dilution zone of unalloyed SMAW


19/20


Thank you for your kind attention


20/20


www.boehler-welding.com

Thank you very much

for your kind attention

Manfred HoeferRegional Technical Manager

Bhler Schweitechnik Austria GmbHKapfenberg Austria

Member of theBohler Welding Group

Documents

Welding Roll Clad Plates