4º Grabación- codificación del macrocriterio de la psicomotricista
C- XII 4º Grabación- codificación del macrocriterio de la psicomotricista
6.5 to 7.5 and the chloride content shall be 100 ppm maximum. After testing, the tested piping system shall be dried as required by the service fluid.
(Amendment) 345.4.2 Test Pressure
(d) The test pressure shall be 1.5 times the design pressure or top of class rating pressure, whichever is higher. When the design temperature is greater than the test temperature, then the test pressure shall be calculated as per equation no 24 of ASME B 31.3. Pressurising of the system shall be carried out in increments of 25% total pressure value or as designated by QP at the time of testing up to the test pressure. There will be a hold for 15 minutes at each increment. This is to ensure that the system is stabilised and to avoid over pressurizing. The pressure shall be maintained at each incremental stage for a minimum of two minutes or as specified by QP. Once the test pressure has been attained it shall be maintained for a period of approximately one hour before the detailed inspection takes place.
(e) Depressurising of the system shall be carried out at a maximum rate 200 psig/minute to avoid vacuum collapse of any part of the system while draining the water after the test. However, depressurising shall be carried out in steps at 25% of total pressure value and there will be a hold for 15 minutes at each step.
(f) Check valves shall be opened to ensure that water is completely drained.
(g) A record charts shall be made of the pressures and temperatures during pressurizing/depressurising as well as during actual testing.
(Addition) 345.5 Pneumatic testing is not permitted without the specific approval by QP.
(Amendment) 345.10 Reinstatement Leak Test
After successful completion of the hydrostatic leak tests, piping Systems/subsystems shall be subjected to leak test to check the reinstatement work.
The test medium shall be water or nitrogen. The water quality shall be as specified in 345.4.1.
The test pressure shall be 90% of the design pressure or 1.1 of the maximum Operating pressure when the system/subsystem includes old existing piping.
The test duration shall be one hour.
Contractor shall submit a detailed procedure for the reinstatement leak test for QP
review and approval. (Addition)
10.0 QUALITY REQUIREMENTS
10.1 The CONTRACTOR shall have a current and implemented QA system and QC procedures for shop and field piping fabrication, erection, etc., in compliance with the requirements of QP-STD-Q-004 and ISO 9000 for all works undertaken and shall meet QP‘s specified requirements.
10.2 The CONTRACTOR shall, within two weeks of receipt of the order, submit for approval a detailed quality Plan for fabrication, welding, installation and testing which complies with the applicable clauses and elements of ISO 9000 standards and project specifications.
10.3 It shall define the structure, welding, fabrication, installation and testing responsibilities, authority levels and internal and/or external interface arrangements of personnel.
10.4 It shall identify the items and services to which this specification applies, the level of control and verification.
10.5 It shall provide documents such as plans, procedures and instructions for the accomplishment of welding, fabricating, installation and testing activities to provide the required quality, taking into account the need for special controls, tests, tools, skills, etc..
10.6 The CONTRACTOR shall be responsible for ensuring that the final documentation and records provide the necessary objective evidence that the quality required has been achieved. This shall include the results of inspections, tests, monitoring of work performance, material and weld identification and related data such as qualifications of personnel and procedures.
10.7 The CONTRACTOR shall provide all necessary certification and documents in accordance with this Specification‘s requirements or any alternative specification identified by QP.
10.8 The CONTRACTOR shall appoint only qualified and experienced personnel with the necessary level of authority to ensure compliance with the requirements of this specification.
11.0 DOCUMENTATION 11.1 GENERAL
11.1.1 All communication, both documentary and spoken shall be in the English Language and all dimensions and weights shall be in SI (System International d' Unites) units.
11.1.2 The documents to be prepared by the CONTRACTOR to facilitate the fabrication and installation of the piping shall provide full and complete information and instructions including detailed methods and procedures. Approval or review of drawings by QP or QP Representative shall not relieve the CONTRACTOR of his responsibility to complete the work in accordance with the Contract Specification.
11.2 DOCUMENT SUBMISSION
The CONTRACTOR shall, as a minimum, submit the following documentation to QP for approval at least two weeks prior to the commencement of work:
a) Fabrication, welding and installation procedures.
b) Detailed fabrication drawings including identification of material grades, weld details and NDT requirements.
c) List of proposed welding consumables.
d) A Register of proposed welding procedures and their areas of application.
e) PQR'S and qualified WPS'S including those for weld repair, in accordance with this specification for both permanent work and temporary attachments.
f) Certificates of welders and welding operators qualified in accordance with this specification. Documents detailing qualifications and experience of engineers and all QA and QC personnel.
g) Procedures for the receipt, storage, handling and issue of welding consumables.
h) Material identification (including welding consumables) and control procedures.
i) Certificates for all CONTRACTORS supplied material (including welding consumables).
j) Procedures for Inspection, NDT, Examination and Testing, Format of the reports and personnel qualifications.
k) Post Weld Heat Treatment procedures and instructions sheets.
l) Forming/Bending Procedures.
m) Hydrostatic Test Procedure.
12.0 APPENDIX
12.1 APPENDIX I - TABLES
12.1.1 TABLE 1 - Welding Procedure Qualification Test Requirements
Test Method Thickness Range
t 25 mm t > 25 mm
NDT Method MPI/RT MPI/RT
Transverse Tensile 2 2
Bend Tests (Note 1) 4 SIDE 4 SIDE
Macro & Hardness 2 2
Charpy V-Notch WM Cap NONE 1
Impact Tests WM Root 1 1
(Note 2) HAZ Cap NONE 3
HAZ Root 3 3
NOTE :
1) Face & Root Bends to be substituted for side bends when t 10 mm.
2) Sets of HAZ Charpy specimens to be taken at FL, FL + 2 and FL + 5.
12.1.2 TABLE 2 A - Welding Procedure Diameter Qualification Ranges
Nominal Pipe Size Qualification Test
Outside Diameter Range Qualified
Thickness Range Qualified
Less than NPS 6 0.5 OD to OD As per ASME IX
Greater than or equal to NPS 6 NPS 3 and above. As per ASME IX
12.1.3 Table 2-B Approval Diameter range for welders Qualification tests
OUTSIDE DIAMETER TESTED RANGE APPROVED
OD 33.4 mm (NPS 1) OD TO 33.4 mm (NPS 1) 33.4 mm(NPS 1) OD 73 mm (NPS 2½) 0.5 OD TO 2 OD
OD 168.3 mm (NPS 6) OD 88.9 mm (NPS 3)
12.1.4 Table 3 - Recommended Filler Metals for P-Numbers 1 thru’ 5
These recommendations are based on matching the impact toughness, the tensile properties and the chemistry of the weld deposit with the parent material. It is by no means exhaustive given the variety of possible applications and so other electrodes may also be acceptable and shall be proven in the PQR testing before any application.
STEEL P-Number SMAW GMAW
GTAW
FCAW SAW
C & C-Mn (-29OC) P-1 E70 XX ER70 S-3 F7 XX-EM12K
(-46OC) E70 XX-1 ER 70 S-3
1/2Cr-1/2Mo P-3 E80 XX-B1 ER 80 X-B2L E81 T1-B1 F8 XX-EXXX-F4
1Cr-1/2Mo P-4 E80 XX-B2 ER 80 X-B2 E8 XTX-B2 F8 XX-EXXX-B2
1-1/4Cr-1/2Mo or B2L or B2L or B2X or B2H
2-1/4Cr-1Mo P-5A E90 XX-B3 ER 90X-B3 E9XTX-B3 F9 XX-EXXX-B3
or B3L or B3L or B3X or B4
3Cr-1Mo P-5A E90 XX-B3 ER 90X-B3 E9XTX-B3 F9 XX-EXXX-B3
E502-XX ER 502 E502T-1 or 2
5Cr-1Mo P-5B E502-XX ER 502 E502T-1 or 2 F9 XX-EXXX-B3
or B6H
9Cr-1Mo P-5B ER 505 E505T-1 or 2
12.1.5 Table 4 - Minimum Recommended Preheat Levels
THERMAL CUTTING
Material Material Thickness Preheat (OC)
C-Steel All 15
Material P-Number Material Thickness (mm) Preheat (OC)
C-Steel P-1 25
Material P-Number Material Thickness (mm) Preheat (OC)
C-Steel P-1 19
12.1.6 Table 5 – Post weld Heat Treatment (PWHT) and Baking
Material P-Number Material Thickness
(mm)
Soak Temperature
(OC)
Soak Time
C-Steel P-1 19 (1)
19
200+10 620+10
2 hours
2.5 mins per mm (min. of 30 minutes
C-Mo P-3 12.5 (1)
12.5
200+10 650+10
2 hours
2.5 mins per mm (min. of 30 minutes
½ to 1¼ Cr-Mo P-4 12.5 (1) 12.5
200+10 650+10
2 hours
2. 5mins per mm (min. of 60 minutes 2 to 3 Cr-Mo P-5A 12.5 (1)
12.5
200+10 700+10
2 hours
2.5 mins per mm (min. of 60 minutes 5 to 9 Cr-Mo P-5B All thicknesses 700+10 2.5 mins per mm (min. of 60 minutes NOTES:
(1) Applies to the existing material in service.
12.1.7 Table 6 - NDT Acceptance Criteria
Type of Defect Limitations for all Service Conditions
Circumferential, Longitudinal and Branch Connections
Cracks Not Permitted.
Lack of Fusion Not Permitted.
Incomplete Penetration. Not Permitted.
Internal Porosity Isolated Pores
The maximum size of isolated pores shall be 1/4 t or 4.0 mm, whichever the lesser. If the separation of two isolated pores is greater than 25.4 mm then maximum size is 1/3 t or 6.4 mm.
For t > 50.8 mm, maximum isolated pore size is 9.5 mm.
Aligned Rounded Indications
Summation of the diameters < t in any 12 t (As per ASME VIII Division 1 Appendix 4)
Slag Inclusions, Tungsten Inclusions or Elongated Indications.
Individual Length t/3.
Individual Width 2.4 mm or t/3.
Cumulative Length t in any 12 t of weld length.
Undercutting Not Permitted.
Surface Porosity or exposed
Slag Inclusion (for t 5 mm). Not Permitted.
Surface Finish The weld shall exhibit a smooth contour and blend with the parent material without causing stress raisers.
Concave Root Surface Not Permitted.
Reinforcement
(for Fillet Welds height is measured from the throat)
The maximum reinforcement shall be as follows:- NPS 4 and below = 1.6 mm for all thicknesses.
Greater than NPS 4 = 3.0 mm for all thicknesses.
Internal Protrusion The maximum root penetration shall not be greater than 1.6 mm for NPS 2 and smaller or 3 mm for larger pipes.
Misalignment To be within the limits of clause 328.4.3 of this specification.
12.1.8 Table 7 - Extent of Non Destructive Testing
The minimum level of NDT is given below. This minimum level may by increased (at any level up-to 100%) if the welds are questionable or the NDT indicates excessive defects.
Group Service of Line Type of NDT & Percent
MPI RT
Sour Hydrocarbon Liquid /Oil or Condensate Sour Gas
Sour crude oil + water + gas mixture (Well Fluid from Wells) Formation Water or Produced Water (with or without dissolved H2S and different material is used)
Sour Oil with high pressure e.g. downstream of the main oil
B Closed Drains for sour gas/liquid Fire Water/Fighting
Glycol, Tri Ethylene Glycol B.A. Cascade (H.P. Side).
Open drain lines for sour gas and sour liquid Sour Atmospheric Vent Gas
(1) 20% examination means 20 welds in 100 welds, which are examined 100%, similarly for 5%
examination. The given 5% and 20% examination shall be increased up to 100% if parts of the tested welds are defective.
(2) QP may specify ultrasonic examination for thickness greater than 19mm.
12.1.9 Table 8 -The number and location of thermocouples shall be as follows:
Pipe Size No of Thermocouples Location of Thermocouples
NPS 6 2 6 and 12 o‘clock
NPS 6 3 4, 8 and 12 o‘clock