API570 exams Flashcards
What is the min preheat temp when perform preheat in lieu of PWHT
The weld area shall be preheated and maintained at a minimum temperature of 300°F (150°C) during welding. The 300 °F (150 °C) temperature should be checked to assure that 4 in. (100 mm) of the material or four times the material thickness (whichever is greater) on each side of the groove is maintained at the minimum temperature during welding.
At what condition should you consult with a CS?
- temp > 750F
2. Temp below brittle
piping INTERNAL inspection should be conducted based on what code?
API510 / 572
what code provides guidance for welding on in service piping?
API 2201
what materials are subject to polytheonic acid SSC?
austenitic SS
Local PWHT may be substituted for 360° banding on local repairs on all materials, provided the following precautions and requirements are applied.
a) The application is reviewed, and a procedure is developed by the piping engineer.
c) A preheat of 300 °F (150 °C), or higher as specified by specific welding procedures, is maintained while welding.
d) The required PWHT temperature shall be maintained for a distance of not less than TWO times the base metal thickness measured from the weld. T
e) Controlled heat also shall be applied to any branch connection or other attachment within the PWHT area.
f) The PWHT is performed for code compliance and not for environmental cracking resistance
WHO will designate any inspection hold points
required during the repair or alteration sequence.
The inspector
Each owner/user organization _______be audited periodically to determine if they are meeting the requirements of an authorized inspection agency as defined in this inspection Code.
SHOULD
SHOULD =?
recommendations
the initial thickness measurement determinations shall be made after no more than ______ of service by using nondestructive thickness measurements of the piping system.
3 months
another term for pneumatic test?
hydropneumatics
Assessment of General Metal Loss Local Metal Loss Pitting Corrosion evaluate blisters and laminations, weld misalignment and piping distortions evaluate crack-like flaws, valuate the effects of fire damage can use what code?
API579
Threaded components and other flanged spool pieces that may be easily removed and reinstalled deserve particular attention because of their higher potential for installation
of incorrect materials of construction
When lifting piping that is in operation, extra care should be
exercised and consultation with an engineer may be necessary.
when is the approval of a piping engineer needed? (3
- assess crack like flaws
- review and/or approve RBI
- when performing a hydrotest to ensure that the piping will be suitable
who can determine whether a hydrotest is necessary after repair welding is complete?
inspector
New connections and replacements may installed on existing piping provided
they are designed and fabricated per the applicable code
use of NDE for substitute for pressure testing needs who approval?
inspector or engineer
extent of material verification used for repairs/alteration is determined by
owner/users
the period between thickness measurements for CMLs or circuits should not exceed (2)
one-half the remaining life or the maximum intervals recommended in Table 1,
what pipe material should be hydro with potable water or steam condensate? and what ppm of clorine?
SS , <50ppm
Acceptance of a welded repair or alteration shall include NDE in accordance with the
applicable code and the owner/user’s specification, unless otherwise specified in API 570.
If calculations indicate that an inaccurate rate of corrosion has been assumed, the rate to be used for the next period shall be adjusted
to agree with the actual rate found.
surveying the route of buried pipe is performend at what intervals?
6 months
The diameter of electrodes should not exceed
_____ .
5/32 in. (4.0 mm).
When the temperature of the base material is below
32 °F (0 °C), what type of electrodes to be used?
low-hydrogen electrodes shall be used
PEr API 570 materials used in welding in making repairs or alteration should be?
of known weldable quality
Who should shall maintain records of welding procedures and welder performance qualifications.
The repair organization
The owner/user shall specify industry-qualified UT angle beam examiners when the owner/user requires _____OR_________
Detection of interior surface (ID) breaking planar flaws when inspecting from the external surface (OD)
OR planar defects
API 570 covers inspection, rating, repair, and alteration procedures for (2)
metallic and fiberglass-reinforced plastic (FRP) and PRD
Piping systems that are known to have a remaining life of over 10 years or that are adequately protected against external corrosion need not be included for the NDE inspection , what type of inspection?
CUI
The inspector should consult with a ______when the short-term corrosion rate changes significantly from
the previous identified rate to determine the cause.
corrosion specialist
Actively engaged as an authorized piping inspector” shall be defined as a minimum of_____ of time spent
performing inspection activities
20%
If the requirements of API570 are more stringent than the regulatory requirements, then the requirements of this Code
shall govern
Who can conduct external inspections, when acceptable to the inspector.
Qualified examiners, operating or maintenance personnel
A corrosion specialist shall be consulted when developing the inspection plans for (2)
- piping systems that operate at elevated
temperatures [above 750 °F (400 °C)] - and piping systems that operate below the ductile-to-brittle transition temperature.
The preheating method, when performed in lieu of PWHT, is limited to the following materials and weld processes: (2)
a) The materials shall be limited to P-No. 1, Group 1, 2, and 3, and to P-No. 3, Group 1 and 2 (excluding Mn-Mo
steels in Group 2)
b) The welding shall be limited to the shielded-metal-arc welding (SMAW), gas-metal-arc welding (GMAW), gastungsten-arc (GTAW), and flux-cored arc welding (FCAW) processes.
preheating method, when performed in lieu of PWHT requirements?
- min temp?
- distance?
- max interpass temp? T
- distance for interpass?
- min temp 300F
- 4 in. (100 mm) of the material or four times the
material thickness (whichever is greater) - cannot exceed 600F
- distance of 4 in. (100 mm) or four times the depth of the repair weld
The controlled-deposition welding method may be used in lieu of PWHT in accordance with the following: (3)
.
a) Notch toughness testing, such as that established
b) The materials shall be limited to P-No. 1, P-No. 3, and P-No. 4 steels
c) The welding shall be limited to the shielded-metal-arc welding (SMAW), gas-metal-arc welding (GMAW), fluxcored arc welding (FCAW), and gas–tungsten arc welding (GTAW) processes.
pressure test shall be performed if practical and deemed necessary by the
INSPECTOR
how often should surface condition on and adjacent to each pipeline be surveyed?
6 months
when the short-term corrosion rate changes significantly who to consult?
CS
Crack-like flaws and environmental cracking shall be assessed by an
engineer and/or corrosion specialist.
Acceptance of a welded repair or alteration shall include NDE in accordance with the (2)
applicable code and the owner/user’s specification
Radiographic profile techniques are preferred for pipe diameters of NPS
1 and smaller.
PRT is very often the technique of choice on NPS ___ and ____?
8 and under when localized corrosion is suspected
Vertical support dummy legs also shall be checked to
confirm that they have not filled with water that is )causing (2
external corrosion of the pressure piping or internal
corrosion of the support leg.
Temporary repairs may remain in place for a longer period of time only if approved and documented by the
piping engineer.
The RBI assessment shall be reviewed and approved by the appropriate
qualified personnel per API 580 and inspector
Assessment of General Metal Loss—
API 579-1/ASME FFS-1, Part 4.
c) Assessment of Local Metal Loss—
API 579-1/ASME FFS-1, Part 5.
d) Assessment of Pitting Corrosion—
API 579-1/ASME FFS-1, Part 6.
To evaluate blisters and laminations
API 579-1/ASME FFS-1, Part 7. I
To evaluate weld misalignment and piping distortions,
API 579-1/ASME FFS-1, Part 8
Substituting appropriate NDE procedures for a pressure test after an alteration, re-rating, or repair may be done only after consultation with the
inspector and the piping engineer.
New connections and replacements shall be designed and fabricated according to the principles of the
applicable code.
A ____________pressure test may be used when it is impracticable to hydrostatically test due to temperature, structural, or process limitations.
pneumatic (or hydro pneumatic)
alteration must be approved by
piping engineer
All repair and alteration work shall be done by a _______ as defined in Section 3 and shall be authorized by the _______prior to its commencement.
repair organization / inspector
who is responsible for approving exceptions to preheat temp used in temp repairs?
engineer
where to pay closer attention to deadlegs?
liquid to vapor
The intent of this Code is to specify the _________(3)_ that is needed to determine and maintain the on-going integrity of piping systems.
in-service inspection and condition-monitoring program as well as repair guidance
min preheat temp in lieu of PWHT
> /= to 300F
Local PWHT may be substituted for 360° banding on local repairs on all materials, provided the following precautions and requirements are applied. (4)
a) The application is reviewed, and a procedure is developed by the piping engineer.
b. A preheat of 300 °F (150 °C), or higher as specified by specific welding procedures, is maintained while welding.
c. PWHT temperature shall be maintained for a distance of not less than 2x base metal
thickness measured from the weld.
Who shall establish inspection intervals for thickness measurements and external visual inspections
the owner/user or the inspector
The material for the repair shall match the base metal unless approved
by the piping engineer.
rerating requirements ? (5)
- calculation performed by engineer OR inspector
- Current inspection records verify that the piping system is satisfactory for the proposed service conditions and that the appropriate corrosion allowance is provided
- Re-rated piping systems shall be leak tested in accordance with the code
- The piping system is checked to affirm that the required pressure relieving devices are present, are set at the appropriate pressure
- Appropriate engineering records are updated.
When lifting piping that is in operation,
extra care should be exercised and consultation with an engineer may be necessary
After welding is completed, a pressure test in accordance with shall be performed if practical and deemed necessary
inspector.
Substituting appropriate NDE procedures for a pressure test after an alteration, re-rating, or repair may be done only after consultation with the
inspector and the piping engineer
Acceptance of a welded repair or alteration shall include NDE in accordance with the
applicable code and the owner/user’s specification
can an examiner evaluation examination?
if trained and authorized by AI
The________ shall establish inspection intervals for thickness measurements and external visual
inspections
owner/user or the inspector
piping is changing in service , who responsibility is it to determine the supplemental inspection for the new service?
inspector or owner/user
During repairs or alterations to alloy material piping systems, _________ shall verify that the installation of new materials is consistent with the selected or specified construction materials.
the inspector
what should be evaluated when trying to determine probability of failure during a RBI assessment?
- forms of damage that could reasonably expected
- operating conditions (past/projected)
- effectiveness of corrosion monitoring problem
After an RBI assessment is conducted, the results can be used to establish the equipment inspection plan and better define the following:(5)
a) the most appropriate inspection and NDE methods, tools, and techniques;
b) the extent of NDE (e.g. percentage of equipment to examine);
c) the interval or due date for internal (where applicable), external, and on-stream inspections;
d) the need for pressure testing after damage has occurred or after repairs/alterations have been completed;
e) the prevention and mitigation steps to reduce the probability and consequence of equipment failure. (e.g. repairs, process changes, inhibitors, etc.).
Before performing any of the required inspections, inspectors shall familiarize themselves with (3)
- prior inspection results,
- prior repairs, current inspection plan,
- and/or other similar service inspections
Inspection ISOs are recommended
- for all unit piping and all Class 1
- for Class 2 rack piping with CMLs
- record dimension and locate CMLS
A list of repair or replacement recommendations
piping integrity is required and shall be kept current. (4)
a) recommended corrective action or repair and date,
b) priority or target date for recommended action,
c) piping system identifier (e.g. piping system or circuit number) that the recommendation affects.
d) list of temporary repairs that may need follow-up monitoring and eventual replacement.
When practical, internal visual inspections may be
scheduled for systems for (2)
- catalyst / transfer lines
2. large piping
reason to remove insulation to check for CUI
- stains
- type of insulation
- age of insulation
CML can be reduce if expected damage mechanism will not result in a wall loss such as (3)
- olefin plant cold side piping
2., anhydrous ammonia piping, clean noncorrosive
hydrocarbon product,
3.high-alloy piping for product purity.
without reinforcement is a repair or alteration?
repair
downgrading hole from X –> Y / upgrading hole is repair or alteration?
downgrade size = repair
increasing size = alteration
local PWHT may be considered for local piping repairs except
when pwht is performed for environmental cracking resistance
when can examiner evaluate results?
trained and if authorized by AI
who evaluated / accepts results?
AI
auxiliary piping inspection is?
optional
deadleg inspection is?
- following same for class 1
2. class 2-4 - inspected where corrriosn has been experienced or anticipated
whenever the RL is less than 4 years the inspection interval
the inspection interval of the RL may up to full RL up to a max of 2 years
