basic qc welding inspection

1. Quality/Welding inspection during Offshore
Pipeline and Platform Installation
By Rahman Suwandhi

2. Personal Data
Name: Rahman Suwandhi
Graduated: Technical of Metallurgy 1997
Residence: Batam
Office: EMAS AMC Pte Ltd – Singapore
Position: Quality/Welding Engineer
Main Business: offshore EPCI oil & gas
company
Contact No: +62 8127041931/+65 94524360
Email: r.suwandhi@emas.com or
suwandhi.rahman@gmail.com

3. Basic Requirements
Qualification and
certification required to
support on the job scope
of work are:
• Welding i.e. CSWIP 3.1,
CWI-AWS
• NDT Level II i.e. ASNT,
PCN
• Painting/Coating i.e.
BGAS, NACE

4. Production flow chart
Material Receiving
Cutting & Fit up
weld Joint
Welding process
Visual & NDT
inspection
Painting/Coating
Inspection

5. Welding inspector role:
To ensure quality of material and
welding meet to the requirement
NDT inspector:
To check weld joint using different
methods i.e. RT, UT, MT/PT complied
to the acceptance criteria
Painting/Coating Inspector:
To control & monitor of quality coating
meet to the requirement

6. Quality Documents:
- ITP (Inspection Testing Plan)
- PQP (Project Quality Plan)
- TQ (Technical Query)
- NCR (Non Conformance Record)
- Procedures: Welding, NDT, Painting, PWHT,
Hydrotest
- Qualified personnel: QC Inspector, Welder, NDT,
Painting Inspector
- Certificates & Reports: material cert, equipments
& tools cert, material & welding traceability record,
NDT report, painting report, PWHT & Hydrotest
report
- MDR (Manufacturing Data Record)

7. Code/Standard/Specification
Must understand on the following:
• Variety of code i.e. material, general
requirements, testing procedure
• Product application: structure, pressure vessel,
pipeline, piping process, storage tank etc.
• International published i.e. AS, ASTM, API, AWS,
ASME, BS, DIN, EN, EEMUA, ISO, JIS, KS, SNI
• Client’s Specification: Total, Shell, Chevron, Exxon,
ENI
• Third party/class requirements i.e. ABS, LR, GL,
BV, BKI, DNV

8. Material Inspection
To check the following:
• Surface condition check i.e. mill scale, material
damage, rusty, coating protection
• Dimension check i.e. length, width, thickness,
diameter
• Purchase/Delivery Order, hard stamp
• Material certificates check

9. Mill Certificates

10. Welding Procedure & welder qualification test
PWPS
Prepare test coupon &
Record parameters
NDT
DT
WPS
Result
Acc
Reject
PQR
Propose Welder
Prepare test coupon
NDT
DT
Result
Welder Certificate
Acc
Reject

11. Welding Inspection
To check the following:
• Before welding: approved
procedures in place,
material, consumables &
equipments/tools certificate
available, joint prep &
preheat within tolerance
• During welding: control
parameters i.e. HI, interpass
temp, PWHT
• After welding: visual check

12. Welding Inspection
Variables to be control & monitor during
production weld:
• Material group i.e. specification, thickness,
diameter
• Joint design, edge preparation
• Welding position & progression
• Welding parameters: voltage, current, travel
speed, Heat Input
• Preheat & interpass temperature
• Post weld heat treatment

13. WPS (Welding Procedure Specification)

14. Visual Inspection
To check the following:
• Weld bead, toe blend,
weld consistency, arc
strike, spatter, grinding
mark, mechanical
damage, surface colour,
misalignment, angular
distortion, longitudinal
distortion
• Refer to the acceptance
criteria as per
code/standard i.e. AWS
D1.1, API 1104, ASME IX,
DNV OS F101 etc.

15. NDT Inspection
• NDT methods: RT, UT,
MT/PT
• Basic testing
• Procedure
Qualification Test
• Approval NDT
procedure
• Acceptance criteria

16. Painting/Coating Inspection
• Type: Paints, HSS,
3LPP, Concrete
• Procedure
qualification test
• Painting inspection
i.e. DFT, pull test,
salt test
• Acceptance criteria

17. Qaulity/Welding Inspection during offshore
pipeline & platform installation
Any question?