1. Write 10 SAEP related to Welding & NDT?
SAEP-321-Performance qualification Testing & Certification of Saudi Aramco welders
SAEP-324 – Certification review and registration of project welders
SAEP-352- Welding Procedure review and approval
SAEP-1140-Qualification and certification of Saudi Aramco NDT personal
SAEP-1142- Qualification and certification of Non Saudi NDT personal
SAEP-1143-Min. Requirements for performing RT
SAEP-1144-Min. Requirements for performing MT
SAEP-1145-Min. Requirements for performing PT
SAEP-1146-Min. Requirements for performing UT
SAEP-1150-Inspection coverage on projects
SAEP-1160-Tracking & Reporting of Welding, NDT & Pressure testing
2. Write 10 SAES related to Welding, Piping & NDT?
SAES-A-206 -Positive Material Inspection
SAES-W-10 –Welding requirements for Pressure vessels
SAES-W-11 –Welding requirements for On-plot welding
SAES-W-12 –Welding requirements for Pipelines
SAES-W-13 –Welding requirements for Offshore structures
SAES-W-14 –Welding Overlay and Welding of Clad materials
SAES-W-16 –Welding of special corrosion-Resistance materials
SAES-W-17-Welding Requirements for API tanks
SAES-L-105-Piping Materials specification
SAES-L-150-Pressure testing of Plant piping and Pipelines
SAES-A-004-General requirements for pressure testing
3. Write 10 SAMSS?
01-SAMSS-010- Fabricated Steel piping
01-SAMSS-035- API Line pipe
01-SAMSS-044- CRA clad pipe spools
01-SAMSS-048- CRA clad or Lined pipe
02-SAMSS-001- Pipe components for Low temperature services
02-SAMSS-005- Butt welding pipe fittings
12-SAMSS-018- Structural plates, Rolled shapes and Tubular specification for fixed offshore platforms
20-SAMSS-001- Welding & Brazing consumables
4. Write 10 SAIC Related to Welding, Piping & NDT?
SAIC-W-2004 PWHT for On-Plot welding
SAIC-W-2005 Pre-Welding Inspection of Plant piping
SAIC-W-2006 In process welding Inspection
SAIC-W-2007 Post welding visual inspection
SAIC-W-2008 Review procedure weld ID and traceability process control tracking
SAIC-W-2010 Receiving inspection of welding consumable
SAIC-W-2013 Inspection of repair on weld joints or base metal welding
SAIC-W-2015 Selection of Welds for NDE
SAIC-W-2032 Control of Welding consumables (storage, handling, conditioning & Issuance)
SAIC-W-2033 Buttering and / or Weld Build up- Plant piping
SAIC-W-2037 Inspection & Review of Socket welding
5. Write 10 SATR Related to Welding & NDT?
SATR-W-2003 Welder Performance Qualification Test Record
SATR-W-2004 PWHT Request
SATR-W-2005 PWHT Report form
SATR-W-2006 Daily weld Fit-up Inspection Report
SATR-W-2007 Daily Weld Production Report
SATR-W-2009 Welding Rod Oven Calibration/Verification Report
SATR-W-2010 Welding consumable Issuance Report
SATR-W-2011 Welding Machines Verification Report
SATR-W-2012 Hardness Test Report
SATR-W-2013 Weekly welder repair rate report
SATR-W-2019 Weekly and Cumulative Weld status report
SATR-W-2020 Welding Consumable Receiving Inspection Report
6. Write 10 International Codes and Std’s?
ASME B31.1
Power piping
ASME B31.3
Process piping
ASME B31.4
Pipeline Transportation system for liquid hydrocarbon and
Other liquid
ASME B31.8
Gas transmission & distribution of piping system
ASME SEC II Part A,
Ferrous material specification
Part B
Non Ferrous material specification
Part C
Specification for welding rods, electrodes & filler metal
Part D
Properties (Metric)
ASME SEC V
Non-destructive testing
Article :1 – NDT General Requirement
Article :2 – RT Examination
Article :4 – UT Examination method for welds
Article :5 – UT Examination method for materials
Article :6 – PT Examination method for welds
Article :7 – MT Examination method for welds
Article :8 – Eddy current examination technique
Article :9 – Visual examination methods & Requirement
Article :10 –Leak test requirement
ASME SEC VIII
Rules for construction of pressure vessels
ASME SEC IX
Welding, Brazing & Fusing Qualification
API 1104
Welding of Pipeline & other facilities
AWS D1.1
Structural Welding code - steel
7. Write 10 ASTM/API specification with ‘P’ No?
8.
ASTM A106 Gr.A,B & C
P1
(CS)
ASTM A333 Gr.1 & 6
P1
(LTCS) (Min. Impact test Temp. -45⁰C)
API 5L Gr.B, GR.X52,Gr.60,Gr.65
P1
(CS)
ASTM A335 Gr.P11
P4
Low Alloy (1 ¼ Cr + ½ Mo)
ASTM A312 TP 304L,316L
P8
SS (C = 0.03%)
ASTM A790 UNS S31803
P10H (Duplex)
ASTM B466 UNS C70600
P34
(Cu Ni 90/10)
ASTM B444 UNSN06625
P43
(Inconel 625)
‘F’ no Classification and examples?
F1- Rutile Electrode
E7022, E7024
AWS SFA 5.1
F2- Heavy Rutile Electrode
E6013
AWS SFA 5.1
F3-Cellulosic Electrode
E6010,7010 (vertical down) AWS SFA 5.1
F4-Basic Electrode
E7015,7016,7018
AWS SFA 5.1
F5-SS Electrode
E308L,309,316,316L
AWS SFA 5.4
F6- Filler wire (SS)
ER-308L,309,316,316L
AWS SFA 5.9
F6- Filler wire (CS)
ER 70S-2,70S-3,70S-6
AWS SFA 5.18
F6- Duplex (Filler wire)
ER2594 -15
AWS SFA 5.9
F5- Duplex (Electrode)
E2594-B2
AWS SFA 5.4
F-6 LTCS (Filler wire)
ER 80 S-Ni 1
AWS SFA 5.28
F-4 LTCS (Electrode)
E 8018-C3
AWS SFA 5.5
ER CuNi
AWS SFA 5.7
F34- Copper Nickel(Fillerwire)
F34- Copper Nickel(Electrode) E CuiNi
AWS SFA 5.6
F43- Inconel
(Fillerwire)
ER-Nicrmo-3
AWS SFA 5.14
F43- Inconel
(Electrode)
E Nicrmo-3
AWS SFA 5.11
9. Write Essential variable for WPS (GTAW&SMAW)?
SMAW
ɸ T Qualified
t Pass >13mm
ɸ P-no Qualified
ɸ F-No
ɸ A-No
ɸ t (deposited weld metal thickness)
Pre-Heat Decrease >55⁰ C
ɸ PWHT
PWHT ‘T’ Limits
Use of thermal Process
ɸ ↓↑Vertical welding (as per SAES-W-11)
–Backing Strip (as per SAES-W-11)
GTAW
ɸ T Qualified
ɸ P-no Qualified
ɸ F-No
ɸ A-No
± Filler
ɸ t (deposited weld metal thickness)
Pre-Heat Decrease >55⁰ C
ɸ PWHT
PWHT ‘T’ Limits
ɸ Change in Filler metal product form
ɸ Single, mixture or %
-Backing gas or ɸ composition
ɸ Shielding gas or Trailing gas
ɸ ↓↑Vertical welding (as per SAES-W-11)
–Backing Strip (as per SAES-W-11)
10. Write Essential variables for WPQ (GTAW&SMAW)?
SMAW
-Backing
ɸ Pipe Diameter
ɸ P-no Qualified
ɸ F-No
ɸ t weld deposit
+ Position
ɸ ↓↑Vertical welding
GTAW
-Backing
ɸ Pipe Diameter
ɸ P-no Qualified
ɸ F-No
ɸ t weld deposit
+ Position
ɸ ↓↑Vertical welding
± Filler
± Inserts
ɸ Filler Metal Product form
-Inert Backing Gas
ɸ Current or Polarity
11. Fillet weld size calculation
Throat
0.7 x T
Leg length 1.4 x T
12. NDT % as per W-11?
Normal above -18C MDT
Normal equal to or below -18C MDT
10%
10% for shop welds
100% for field welds
Category D above -18C MDT
None
Category D equal to or below -18C MDT
10% for shop welds
100% for field welds
Category M
100%
MT or PT% - All pressure containing welds Other than butt welds shall be 100% examined
13. PWHT VARIABLE
Heating rate, cooling rate, soaking time, soaking temperature, Thickness of Material &
Number of thermo couples
14. Welder repair rate & formula
0.2% Linear & 5% Joint basis
(If Liner above 0.5% & Joint base above 7.5%, qualification to be revoked)
%RR = (Lr/Lw) X 100
(Welders total length of repairs in 1 week, mm/ Welders total length of weld radiographed in 1
week)
15. Heat input formula
Ampere X Voltage X 60 / Travel speed = J/MM or CM
16. Carbon equlent formula
C+ Mn/6 + Cr Mo V/5 + Ni Cu/15
17. Socket joint gap and welding requirement
Min 1.5 mm, Max 3 mm before welding
18. Calibration std for Welding machine
BS 7570
19. What is the purpose of Post heating ?
Post-heating refers to the maintenance of preheat after the weld has been completed,
to allow increased rates of hydrogen evolution from the weld to occur
20. Duties and Responsibilities of Welding Inspector?
Perform material inspection.
Perform consumable inspection.
Application of inspection gauges, instruments and tools.
Check equipment and accessories.
Witness procedure qualification test.
Witness welder qualification test.
Perform visual inspection.
Review / witness NDT
Witness mechanical test.
Monitor heat treatment
Observe production and fabrication welding.
Interpret and assure compliance to Code / Standard / Specification.
Review technical drawing.
Witness weld repair.
Prepare and compile inspection records.
21. What should be the distance b/w two parallel welds?
20mm or three times the wall thickness of the joint, whichever is greater.
22. What factors (give at least four) are taken into account when selecting and designing a joint for a welding
application?
Strength
Accessibility for welding
Minimize distortion
Cost of welding
Accessibility for inspection
23. What is a welding procedure specification (WPS)?
The WPS is a written document that provides direction to the welder for making production
welds in accordance with Code/Standard requirements.
24. How is the Procedure Qualification Record (PQR) different from the WPS (Welding Procedure Specification)?
Procedure Qualification Record certifies that test welds performed in accordance with the WPS
meet Code requirements and summarizes the specific test results.
25. What is a “Weld Map” and how is it used?
It is an isometric drawing showing the location and numerical identification of each weld used in
the construction of a process piping system. Each weld when completed is labeled with the weld
number indicated on the weld map, the date completed, and the welder/welding operator
identification number or code.
26. How can you verify that the received electrode has the chemical composition as per MTC?
By verification of chemical composition of filler materials through chemical analysis
method.
By verifying the heat no. and Lot no. of welding consumables
27. What are the tests required for analysis of consumables and the standard for this analysis?
TestsChemical analysis method
Positive Material Identification (PMI)
StandardASME Sec IIC
28. What does L stands for 316L and the composition?
Low Carbon (0.03%)
29. What are the criteria for selecting welding consumables?
Welding consumables shall be selected based on their mechanical properties,
compatibility with the materials to be joined, their suitability for the intended service, and
consideration of polarity, position, and direction of welding.
30. What do you meant by low hydrogen consumables?
Low hydrogen consumables are defined as less than or equal to 8 ml of hydrogen per 100 g of
deposited weld metal.
31. Give the names of two aluminium flake weldable primers? And the maximum coating
thickness?
Bloxide and Deoxaluminate.
The max coating thickness shall not exceed 0.050mm (0.002 inches).
32. What is the heating and cooling rate for PWHT?
The PWHT heating and cooling rates above 316°C shall not exceed 222°C/hr divided by the weld
thickness in inches, but in no case shall it be more than 222°C/hr.
33. Mention the drying temperatures for low hydrogen SMAW electrodes?
260-430°C for 2 hrs min (A5.1)
370-430°C for 2 hrs min(A5.5)
120-250°C for 2 hours minimum. (SS and Non-Ferrous electrodes)
34. What are the types of Mechanical tests?
Tension Tests
Guided Bend Tests
Fillet Weld Tests
Notch Toughness Test
Stud Weld Test
35. Different types of electrodes?
Cellulosic
Deep penetration in all positions.
Suitability for vertical down welding.
Reasonably good mechanical properties.
High level of hydrogen generated – Risk of cracking in the HAZ.
Rutile
Moderate weld metal mechanical properties.
Good bead profile produced through the viscous slag.
Easily removable slag.
Basic
Low hydrogen weld metal.
Requires high welding current/speeds.
Poor bead profile (convex and coarse surface profile)
Slag remove difficult.
36. What is the function of shielding gas?
Stabilizes the arc roots on the material surfaces.
Ensures smooth transfer of the molten metal from the wire to weld pool.
Forms the arc plasma.
37. What is Carbon Equivalent?
It is empirically equivalent of all alloying elements contributing to hardening in form of
carbon percentage
38. What is the importance of CE ?
It gives information regarding hardenability of the structures and also the necessity of
taking precaution for welding
39. How do you utilize CE?
To determine preheat.
To limit material thicken.
To select right consumables & process
40. How to calculate preheat?
Up to 0.45
Optional (but not less than 10°C
0.45 to 0.60
100 °C - 200°C
>0.6%
200°C - 350°C
41. What are the precaution to be taken during preheat?
Heating shall be done uniformly and maintain throughout the cross section of the
material.
Take temperature measurement after a typical time of 10-15 seconds.
Use right range of temple stick/thermal chalk/pyrometer.
42. Where the temperature measurement be placed to check preheat temperature?
Opposite surface.
43. In case of flame heating (for heating) where is the location on base material where flame should
be directed?
1” to 2” away from the weld zone.
44. Is preheating required for SS material (Austenitic)?
No.
45. Why preheating is not required in case of Austenitic Stainless Steels?
To avoid sensitization.
46. What is Inter pass temperature?
It is the temperature to be maintained between the runs of welding.
It is one of the parameters like preheat which gives desired mechanical properties.
47. Where do you specify inter pass temperature?
For CS materials (depending on the composition) it is at any time minimum inter pass
temperature and maximum inter pass temperature as specified in approved WPS.
Specified when inter pass temperature is mandatory.
For CS : max. 315°C
For SS : max. 177°C
48. What is PWHT?
It is heat application (Generally up to 550°C-650°C for C,C-M steels) to an assembly after
welding for the purpose of:
Reducing of residual stresses.
Hydrogen removal & Tempering
49. What is the use of covering in covered arc electrodes?
To displace O2 & N2 of the atmosphere and to maintain shielding gas around the arc
and molten metal.
50.
51.
52.
53.
54.
55.
56.
57.
58.
59.
60.
To produce slag which protects molten metal from oxidations.
To deoxidize and refine weld metal.
Controls the operating characteristics of the of the electrode- burn off rate, penetration.
To provide cap around the upper position of arc and prevents air being dragged in.
Deposition efficiency (Iron Powder type).
What is rutile electrode? ( Ex.7012,7013 )
Majority, i.e.@ 45% of covering is Ti,O2 (rutile).General purpose structural electrode
with medium penetration and smooth arc (less spatters).
What are cellulosic electrodes? (E6010,E6011).
Basic constituents of covering is cellulosic.
Deep penetration, forceful arc, rapid burn-off rate.
Contain 4-6% moisture No backing is required.
What is basic electrode? (E7018,E7018-1)
Flux covering is high in calcium, carbonate, calcium fluoride.
No combined water is available and hence no hydrogen pick-up.
Good transfer efficiency of alloying elements from the coating to weld deposit.
Smoother and quite arc, low spatter, adequate penetration.
Good impact, low hydrogen Crack resistance.
High radiographic acceptance.(Quality)
How do you take care of low hydrogen electrodes?
Keep boxes in closed room with < 50% RH.
Open only those boxes which are to be used.
Bake the electrodes (250°C-300°C for 2 hours-till use).
Hardness testing value for production welds?
P1 Materials
200 BHN
Alloy Materials
235 BHN
Duplex Materials 270 BHN (Sour service)
Duplex Materials 285 BHN (Non-Sour service)
What is the AWS Standards for Weld symbol, Shielding Gases & Standard Terms & Definition?
AWS A2.4, AWS A5.32 & AWS A3.0
Which is the Material Standards for H2S Containing Environment in Oil & Gas Production?
NACE MR0175/ISO 15156
What does -15,-16 suffix denotes in SS covered electrodes?
-15 : Lime type covering contain largely calcium minerals (Alkaline).Generally used with
DCEP.
-16 : Can have lime type or Titanium dioxide type (T102).Also these covering contains
readily ionizing elements like potassium to stabilized arc, can be used with DCEP or AC.
What is “L” stands for in the electrodes?
Low Carbon ( <0.03% )
What are generally used SS filler wire in GTAW (For SS welding & Dissimilar welding).
ER308L,ER309L,ER310,ER316L,ER347L (SFA 5.9, F No.6)
What are generally used covered electrodes in austenitic stainless steels?
E308L-16,E309L-16,E310-16,E316L-16..etc..
SFA 5.4
F No.5
61. What are generally used SAW filler wire/flux?
F 6AO-EL8, F7 A2-EH14
(SFA 5.17, F No.6)
62. Excessive heat input is mainly attributed to what poor welding techniques during SMAW process?
Excessively wide weaving and slow travel speed.
63. What are 3 potential sources of Hydrogen encountered during SMAW process?
Moisture in the metal and electrode coating, oil, elemental Hydrogen in the base metal
64. What are several likely causes of porosity in carbon steel welds using the SMAW process?
Poor welding technique and equipment, excessive wind, moisture & weld contaminants.
65. . Where would cracking most likely occur from excessive current input in a single pass weld?
Centerline of the weld
66. How is Magnetic Particle inspection of a weld using the wet continuous test method performed?
The particles (usually fluorescent) are sprayed, poured on or applied by immersion and
the magnetizing current is applied while the particles are still flowing.
67. Indications with Liquid Penetrant Testing are easily seen if the surface has been prepared by
grinding prior to testing? True/false? Why?
False, because grinding can smear metal and mask/cover discontinuities.
68. Name an NDT method and technique that employs a reflected sound beam that can be used for the
volumetric examination of welds?
Ultrasonic Testing using Shear Wave Technique provides good volumetric exam coverage
69. Relating to Contractor Weld Shop evaluation prior to the beginning of pipe welding for a major
project, what are several key items you would look for as the Inspector assigned to approve the
shop for Company?
5M + E formula = Manpower, Methods, Materials, Machines, Measurement,
Environment
Manpower=Ensure adequate Personnel that are trained, qualified, certified & approved
Methods=Ensure that standards are followed and that welding procedures, special processes
(PMI, PWHT, etc) are acceptable and that there is a good quality system (paper trail) in place.
Materials=Ensure Materials are approved, certified, documented (traceable), stored correctly
with area for deficient items (quarantined), and segregation of dissimilar metals.
Machines=Ensure Equipment is adequate for the intended work and in good working condition.
Measurement=Ensure Contractor QC Program & testing/calibration program is in place for
equipment and work.
Environment=Ensure that the working environment (building) is safe, sheltered from the
elements and adequate to ensure quality work
70. After a rejected weld has been repaired, re-inspected and found to be acceptable the
welding inspector should:
Change the original inspection report to indicate the parts acceptance.
Mark directly on the part
Fill out a second inspection report
None of the above
71. The performance of which of the following test methods is least affected by high
part température?
ET
RT
72.
73.
74.
75.
76.
77.
78.
79.
80.
PT
UT
Crater cracks are most often the result of:
improper technique
improper filler metal
improper base metal
all of the above
During tempering, as the temperature increases, which of the following are
correct?
hardness increases
hardness decreases
elongation decreases
a and c above
The technique which does not aid in reducing residual stress is:
Peening
vibratory stress relief
thermal stress relief
external restraint
Which Of the following tests, which are to be used for the actual determination of a
materials toughness?
Charpy test
Chemical analysis
All of the above
The surface between two pieces to be joined that lie in parallel
planes are called:
weld interface
faying surface
weld edge
groove face
NDE technicians are usually qualified in accordance with the requirements of:AWS D1.1
API 1104
ASNT SNT-TC-1A
ASME Section VIII
Capillary action plays a role in which NDE method?
RT
UT
MPT
PT
If a welder is continually turning out rejectable work, the welding inspector should:
inspect his work more critically
ask that the welder use another process
require that the welder be retested for qualification
instruct the welder use proper technique
Shielding gases used for GMAW can include:
carbon dioxide
argon
helium
all of the above
81. In SMAW, an increase in arc length results in:
increased current; increased voltage
decreased current; increased voltage
increased current; decreased voltage
decreased current; decreased voltage
82. weld inspection report should always;
be completed in ink, or type written and signed
be done in pencil so mistakes can be easily corrected
be maintained only if the weld is rejectable
include the welders identification
83. In GMAW, the type of metal transfer requiring a special power source is;
spray
globular
pulsed arc
short circuiting
84. For plain carbon steels, how are hardness and tensile strength related?
increase hardness; decrease tensile strength
increase hardness; increase tensile strength
decrease hardness; increase tensile strength
hardness and strength are not related
85. The welding variables used to calculate heat input are;
voltage and current
current and travel speed
voltage, current and travel speed
preheat temperature, travel speed and voltage
86. Which of the following tests can be judge weld soundness?
nick break
side bend
radiography
all of the above
87. An E7016 SMAW electrode exhibits which of the following characteristics?
low hydrogen; AC only; iron powder
low hydrogen; AC and DCEP
low hydrogen; AC and DCEP; iron powder
rutile; DCEP; iron powder
88.Which of the following contains ferrous base metal specifications?
AWS D1.1
ASME Section II, Part C
ASME Section IX
ASME Section II Part A
88. Which of the conditions below can cause porosity in a weld?
welder technique
damp electrodes
oily base metal
all of the above
89. Which of the following discontinuities is not associated with GTAW?
lack of fusion
slag inclusions
tungsten inclusions
porosity
90. The welding process that uses a non-consumable electrode is;
GMAW
SAW
GTAW
FCAW
91. Which of the following gasses is not commonly used as a shielding gas for GTAW?
Argon
Carbon Dioxide
Helium
Argon / Helium
92. Which type of GMAW metal transfer results in the least amount of penetration?
Globular
Short circuiting
Spray
Pulsed spray
Globular spray
93. What dimension is measured to determine the size of a concave fillet weld ?
Its height and length
94. What dimension is measured to determine the size of a convex fillet weld ?
Its throat
95. Using GTAW process, describe what happens to a root pass applied without purging/back gauging on
SS ?
It will produce oxidizing, coking to the weld metal
96. Indications with Liquid Penetrant Testing are easily seen if the surface has been prepared by grinding
prior to testing ? True or False ? Why ?
False, surface discontinuities of the examine area will not be seen or occur
97. If a product is to be stress relieved, why is it important to use exactly the same RT procedure before
and after stress relieving?
To ensure the weld has no cracks or defects.
98. What are the diameter limitations ( per pipe size ) for the different welding processes ?
SMAW
GTAW
GMAW
3”- up
½” to 10 ‘
3”- up
99. What is the maximum size of low hydrogen ( E7018 ) permitted ?
5mm for the 1g/1f position, 4mm other positions
for non-hydrogen; 5mm for all positions
100. What is the requirement ( Material, location ) for bridges tacks ?
It should be same materials, electrodes , minimum preheat and should be located above
the root area
101. If welder qualifies on 2G and 5G positions, how many positions he can qualified?
All positions
102. Internal misalignment of butt joints shall not exceed ____mm.
1.6mm OR as per approved WPS
103. What is the standard material temperature for conducting PT &MT?
PT:
Between 5⁰ C to 52⁰C
MT:
If using Dry particle - max. 315⁰C
If using Wet particle -max. 50⁰C
104.The acceptance criteria for Magnetic particle examination shall be ASME SEC VIII, Appendix
number_____
Appendix number-6
105. The acceptance criteria for Liquid penetrant examination shall be ASME SEC VIII, Appendix
number_____
Appendix number-8
106. Potable electrode oven heated to ________deg centigrade minimum.
65°C
107. Electrode, filler wires and fluxes shall conform to ASME Section ______ Part___
Section II part C
108. Tack welds shall be sufficient size to maintain joint alignment’’ The recommended tack thickness is
______
3.2 to 4.8mm
109. Tack welds shall be sufficient size to maintain joint alignment’’ The recommended tack length is12.5 to 25.4mm
110. ‘‘If welder welded a joint without JCC card’’, what is your action as a welding inspector?
If the welder is actually having JCC card & qualified for the joint he welded, but
forget to keep the JCC with him during the time of weld, he may be given one
more chance with warning letter. And if doesn’t have the JCC at all, he should be
revoked from the project and welded joint shall be cut & re-welded with
qualified welder.
111. Can you allow using Nitrogen as a back purging for SS piping? If Yes Why? And If NO reason?
No, nitrogen gas is slightly reactive, so the purpose of back purging (making
inert atmosphere at the root side) will not be achieved.
112. ‘’Welder welded joint without your fit-up inspection’’ What is your action as a welding inspector?
If visually accepted that weld joint, then it will be radiographed. Based on RT
report the joint will be accepted or rejected. At the same time welder should be
given warning for not repeating such mistakes in future.
113.How you will do welder identification and marking after complete of the joint?
From the information given close by the joint such: Line no; Joint no; WPS no;
Fit-up date, Piping QC sign; Welder no, date of joint welded; Sub con/Con
signature. Visual Acc/Rej:
114. All pressure containing welds other than butt welds including branch connections such as
weldolets, sockolets and weld bosses shall be 100% examined for what type of materials and
what type of NDT? As per JERES-W-011
P3, P4 & P5 materials shall be 100% examined with florescent MT
115. What is the power source used in Manual & Automatic welding?
Manual welding
– Constant current
Automatic welding
– Constant voltage
116. As per SAES-A-206 What is the acceptable range in Welds with consumables that match, or nearly
match, the base metal composition allowed in ASME SEC IIC for each element?
Ans: ± 12.5%
117. . As per SAES-A-206 Alloy shall be acceptable if the alloying elements are each within -----% of the
specified range of values?
Ans: 10%
118.The maximum size of socket-welded joints in hazardous services and new construction sour service?
Hazardous service
: 1½-inch
(SAES-L-110)
New construction sour service : 1 inch
119.Draw the diagram of double bevel joint?
120. For P-No.5 and higher materials up to what weld metal thickness back purging shall be maintain?
10mm
121. What is the Impact testing temperature for Welding consumable?
27 J at -45⁰C
121. One welder qualified GTAW process on SS material, can he weld Carbon steel material with same
process? Yes/No
121. In the above question justify your answer.
Deletion of inert backing gas is an essential variable.
122. One welder qualified in SS material with SMAW electrode. Can he weld CS material with same
process? Yes/No
123. In the above question justify your answer
Change in ‘F’ no is an essential variable
124. ER-70 S used for which type of welding process?
GTAW & GMAW
125. SFA number for E7018-1 electrode
AWS SFA. 5.1
126. E7018 electrode ‘1’ stands for?
All position
127. RT% for Inconel weld joint?
Ans: 100%
128. RT% for 304 & 316 materials (As per W-11)
Shop-10% and Field-100%
129. What is Autogeneous welding?
The welding performed without filler metal is known as Autogenous welding
120. Welder qualified in Carbon steel SMAW can weld SS SMAW?
No. (change in F no is essential variable) ‘F’ no for CS is F4
SS is F5
121. For SS 316 material which NDT methods shall be used?
PT.
122. Which NDT method is used for Repair weld?
Same method (original testing method)
123. ER 70S-2 is used for which welding process?
GTAW
124. Acceptance criteria for undercut as per B31.3?
≤ 1 mm
116. As per SAES-W-11 Low-hydrogen electrodes or a low-hydrogen process to be used when welding
on the line pipe, the heat input shall not exceed------------?
1.8 KJ/mm
124. Major Alloying elements in Alloy Welding Electrodes (ASME SEC IIC).
A = Carbon + Mo. steel electrodes
B = Cr + Mo. Steel electrodes
C = Ni steel electrodes
D = Mn + Mo. Steel electrodes
G = General Low alloy steel electrodes
(Example: E7018-A1,E8018-B2,E8018-C3,E8018-D3,E7018-G).
125. Welder Qualification Diameter Limits?
126. Performance Qualification – Position and Diameter Limitations.
127.Procedure Qualification Thickness Limits and Test Specimen requirement?
128. Fillet welds (Plate & Pipe) for PQR
PLATE
PIPE
129. Performance Qualification Thickness Limits and Test Specimen requirement?
130. Reinforcement Acceptance Criteria as per B31.3.
131. Reinforcement Acceptance Criteria as per B31.3 SEC-K.
132. Minimum Impact test temperature for ASTM A333 GR.1,3,4,6,7 & 8 material.
133. Pre heat Temperature Requirements as per B31.3 (Year-2014)
134. PWHT Requirements as per B31.3 (Year-2014)
135. Line class Designations as per SAES-L-105.