Qualification of brazing procedures

Report
Qualification for Brazing
Mathias Lundin, Swedish Welding Commission
Swedish Welding Commission - www.svets.se
<=
Mathias Lundin
1
Activities to controll
= Tasks
Review of requirements
Operating procedures
Technical review
Documentation
Sub-contracting
Testing, storage and handling of brazing consumables and parent material
Brazers and operators
Heat treatment
Brazing coordination
Inspection and testing personnel
Production equipment
Inspection prior, during and post
brazing
Maintenance of equipment
Non-conformance and corrective
actions
Production planning
Calibration and validation
Brazing procedure specifications (BPS)
Identification and traceability
Qualification of brazing procedures
Quality records
Swedish Welding Commission - www.svets.se
<=
Mathias Lundin
2
Qualification of brazing personnel
ISO 13585 Brazing — Qualification test of brazers and brazing operators
”brazer ability to by hand manipulate the device for heating following a specification
to reproduce a braze joint with acceptable quality”
”operator ability to follow a specification to reproduce a braze joint with acceptable
quality”
Essential variables => Range of qualification
Key elements
a)
brazing process
b)
product type
c)
type of joint
d)
parent material group(s)
Requirements for testing
e)
brazing filler metal type
Acceptance criteria
f)
brazing filler application
g)
dimension (material thickness, outside pipe
diameter and overlap length)
h)
filler metal flow direction
i)
degree of mechanization
Standardized test pieces
Essential variables
Ranges of qualification
Requirements for validity
Requirements for certificate
ISO/FDIS 13585
Swedish Welding Commission - www.svets.se
<=
Mathias Lundin
3
Qualification of brazing procedures
ISO/PWI xxxxx
Brazing – Qualification and specification of brazing procedures
(revision of EN 13134)
Verifying joint properties
”special process – since joint properties and integrity can not be fully verified with NDT
after brazing, a procedure needs to be qualified and reproduced during production”
Essential variables/range of qualification – different compared to personnel
brazing process
parent material group
brazing filler and flux
dimensions
working temperature
etc
Swedish Welding Commission - www.svets.se
<=
Mathias Lundin
4
Qualification of brazing procedures
Working order for procedure test
preliminary “work
instruction
pBPS
Braze test (brazing of standardized test piece)
Verifing tests + evaluation
(visual testing, NDT, destructive testing)
Brazing Procedure Qualification Record (BPQR)
BPS
BPS
BPS
essential variables =>
range of qualification
closer tollerances for
instructing the operator
Swedish Welding Commission - www.svets.se
<=
Mathias Lundin
5

similar documents