d-211 diseño y fabricacion especificaciones

8/12/2019 D-211 Diseo y Fabricacion Especificaciones

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PDVSA N TITLE

REV. DATE DESCRIPTION PAG. REV. APPD. APPD.

APPD.BY DATEDATE

VOLUME 21

PDVSA, 1983

D211 PRESSURE VESSEL DESIGN AND

FABRICATION SPECIFICATION

MODIFICATION PAR 1.2.1 & SECTION 2.2.

Alexis Arvalo Jess E. RojasDEC.98 DEC.98

ENGINEERING SPECIFICATION

MAR.94

Y. K.

L.T.

5

3

GENERAL REVISION 17

19

A. A.

E.J.

J. E. R.

A.N

ENGINEERING DESIGN MANUAL

SPECIALISTS

APPD.BY

MODIFICATION PAR 1.2.1;3.3;3.5;3.7 & 9.2SEP.95 L.T.4 19 E.J. A.N

DEC.98
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PRESSURE VESSEL DESIGNAND FABRICATION SPECIFICATION DEC.985

PDVSA D211

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Index

1 GENERAL 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 SCOPE 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 REFERENCES 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.1 COVENIN 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.2 Petrleos de Venezuela S.A. (PDVSA) 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.3 ASME (American Society of Mechanical Engineers) 3. . . . . . . . . . . . . . . . .3.4 ASME/ANSI (American National Standards Institute) 3. . . . . . . . . . . . . . . . .3.5 Process Industry Practices (PIP) 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 DESIGN 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 General 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.2 Combinations of Loads 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.3 Wind Load Requirements 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.4 Seismic Loads Requirements 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5 Supports 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.6 Vessel Drawings 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.7 Wind Induced Vibration of Vertical Vessels 6. . . . . . . . . . . . . . . . . . . . . . . . . .4.8 Confined Joints and Gasket Centralizer 6. . . . . . . . . . . . . . . . . . . . . . . . . . . .4.9 Connections 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.10 Inspection and Access Openings 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 MATERIALS 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.1 General 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.2 Bolting and Gaskets 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.3 Skirt for Stainless Steel or HighAlloy Vessel 9. . . . . . . . . . . . . . . . . . . . . . .

6 FABRICACION 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.1 General 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.2 Welding 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.3 Internals 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 INSPECTION 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8 POSTWELD HEAT TREATMENT (PWHT) 12. . . . . . . . . . . . . . . . . . . . .

9 HYDROSTATIC TEST PRESSURE 12. . . . . . . . . . . . . . . . . . . . . . . . . . .10 PNEUMATIC TEST 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11 NAMEPLATE 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12 PAINTING AND MARKING 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13 SHIPMENT 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14 REPORTS 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15 GUARANTEE 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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1 GENERAL

This specification partly references to the selected alternatives permitted by theASME Code Section VIII and describes design and construction practices notcovered by the Code, which are preferences of PDVSA. The regulations of theCode are not quoted in this Specification.

2 SCOPE

2.1 This specification together with the vessel drawings, requisitions and purchaseorder / inquiry, indicates the requirements to be met by the Seller in the design,fabrication, inspection, testing and supply of unfired pressure vessels.

2.1.1 In case of conflicts, the purchase order and drawings take precedence over thisspecification.

2.1.2 All unfired pressure vessels shall be designed, fabricated, inspected and stampedin accordance with the requirements of the latest edition of ASME Boiler andPressure Vessel Code, Section VIII, Division I or Division II and the respectiveAddenda, with the conditions expressively indicated in this specification.

2.1.3 All deviations from this Specification, the purchase order, or the drawings shallhave the written approval of the PDVSAs representative.

3 REFERENCESThe latest edition of following standards and PDVSA specifications shall form partof this specification. Should there be any conflict between Venezuelan laws,regulations and codes, and other codes and standards, the order of prevalenceshall be as follows:

Venezuelan laws, regulations and codes

This specification

Other codes and standards

3.1 COVENIN 2003 (Provisional) Acciones del Viento sobre las Construcciones.

3.2 Petrleos de Venezuela S.A. (PDVSA)

A261 Criterios y Acciones Mnimas para el Diseo de Estructuras

JA221 Diseo Sismorresistente de Instalaciones Industriales

JA222 Diseo Sismorresistente de Recipientes y Estructuras

90615.1.013 Gua de Diseo. Cargas Ssmicas en Recipientes y Estructuras
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O201 Painting Material and Application Requirements

0603.1.301 Saddles for Horizontal Vessels0603.1.306 Anchor Bolts

90615.1.007 Vertical Vessel Foundations

90615.1.008 Horizontal Vessel Foundations

10603.2.306 Wire Mesh Separators and Supports

10603.2.404 Insulation Supports for Vertical VesselsHot Service

A2.224 Insulation Supports for Horizontal VesselsHot Service

A2.701 Tolerances for Pressure Vessels

3.3 ASME (American Society of Mechanical Engineers)

Boiler & Pressure Vessel Code Latest Edition and Addenda.

Section II Material Specifications

Section V Nondestructive Examination

Section VIII, Div. 1 Pressure Vessels

Section VIII, Div. 2 Pressure Vessels

Section IX Welding and Brazing Qualifications.

3.4 ASME/ANSI (American National Standards Institute)

B1.1 Unified Inch Screw Threads

B16.47 Large Diameter Steel Flanges NPS 26 Through 60B 16.5 Pipe Flanges & Flanged Fittings NPS Through 24

B 16.9 FactoryMade Wrought Steel Buttwelding Fitting.

B16.20 Metallic Gaskets for Pipe FlangesRing Joint, Spiral Wound andjacketed

B 16.21 Non metallic Flat Gasket for Pipe Flanges

B 16.25 Butt Welding Ends

3.5 Process Industry Practices (PIP)

VECV1001 Vessel Design CriteriaASME Code Section VIII, Division 1

4 DESIGN

4.1 General

4.1.1 The requirements of the ASME Pressure Vessel Code referred to in the point 2.3shall be considered as the minimum requirements.

4.1.2 Pressure vessels shall be designed to withstand the loading exerted by internalpressure, weight of the vessel, wind, earthquake, reaction of supports, impact,
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and temperature. Manufacturer shall verify external loads on shell or heads

(piping, platforms, etc.)4.1.3 The Maximum Allowable Working Pressure shall be limited by the shell or head,

not by minor parts.

4.1.4 All vessels shall be designed to be freestanding.

4.1.5 All vessels shall be designed for either wind or earthquake loading, whichever isgreater: It is assumed that wind and earthquake loads do not occursimultaneously.

4.1.6 The deflection of vertical vessels under normal operating conditions shall notexceed 0,15 m per 30,5 m of length (6 inches per 100 ft).

4.1.7 Localized shell stresses at all supporttoshell locations shall be evaluated andshall include considerations, as applicable, of windload, earthquake and all otherloadings described in UG22 of ASME Code.

4.1.8 Manufacturer shall run stress analysis for all pipe supports and platforms clips tobe welded to shell and heads. If needed, reinforcing pads shall be welded.

4.1.9 When reinforcing pads are used under supports, consideration should be givento stresses due to possible temperature differentials between the vessels, padsand supports.

4.1.10 PDVSA reserves the right to inquiry Manufacturer Finite Element Analysis (FEM)

for stress concentration points.

4.2 Combinations of Loads

Design loads definitions and load combinations shall be in accordance with PIPVECV1001, Vessel Design Criteria ASME Code Section VIII, Division 1,subtitles 5.10 (Design Load and Load Combinations) and 5.10.9 (LoadCombinations), except for seismic and wind loads.

4.3 Wind Load Requirements

Wind loads requirements shall be per COVENIN 2003, Acciones del Viento sobre

las Construcciones.

4.4 Seismic Loads Requirements

Seismic and earthquake loading shall be calculated in accordance with PDVSASpecifications JA221 and JA222. The maximum displacements shall notexceed stated limits of Section 3.7 herein.

4.5 Supports

4.5.1 Vertical vessels shall normally be supported on skirts or lugs.
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4.6.3 The location of all vessel components openings, seams, internals, etc., of the

vessel shall be indicated on the shop drawings by the distance to a commonreference line. The reference line shall be permanently marked on the shell.

4.6.4 Copies of the Sellers drawings shall be submitted to the PDVSAs representativesfor approval before any work shown on the drawings is commenced. One copyshall be returned bearing the PDVSAs representatives stamp and notations of anyrequired changes. Number of copies required of required documents shall beincluded in purchase order. All drawings shall be on reproducible and electronicsformat once approved by the PDVSAs representative.

4.7 Wind Induced Vibration of Vertical Vessels

Per subtitle 5.11 of PIP VECV1001, Vessel Design CriteriaASME Code SectionVIII, Division 1.

4.8 Confined Joints and Gasket Centralizer

Per subtitle 5.13.8.3 of PIP VECV1001, Vessel Design Criteria ASME CodeSection VIII, Division 1.

4.9 Connections

4.9.1 Flanges shall be per ASME Standards B16.4 and B16.47, or per ASME Code

Section VIII, Division 1, Allowable stresses shall be determined by ASME CodeSection II. ASME B16.47 Series (A or B) shall be indicated by the PDVSAsrepresentative on the Data Sheet.

4.9.2 Unless otherwise specified the minimum size connections shall be 2, flanged andshall have the same Pnumber as the vessel shell. Corrosion protectionequivalent to that of the vessel shall be provided.

4.9.3 Drain connections or other connections which may be used as drains shall betrimmed flush with the inside of the vessel.

4.9.4 All other connections may project internally up to the extent required for welding

and be contoured to shell but the projection of nozzles within tray areas shall notinterfere with tray installation or removal.

4.9.5 All inside edges of connection, whether flush or projecting shall be ground to aminimum radius of 3 mm.

4.9.6 Flanged connections may be constructed as integrally forged nozzles or may bebuilt up from seamless pipe or rolled plate butt welded to forged welding neckflanges. Forged slipon may be used for 150# ANSI nozzles where the designtemperature is under 260 C.
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4.9.7 Manholes for design pressures equal or less than 3,5 kg/cm2 abs. (50 psia) and

design temperatures equal or less than 232

C (450

F) may be of special builtup plate design.

4.9.8 Flange rating, facing and finish, material and bolting will be specified on PDVSAsrepresentative drawing or Data Sheet.

a. Wherever possible, the flange rating and facing shall be consistent with thespecification of the connecting piping.

b. Manhole and handhole flange facing shall be similar to nozzles in the samesection of the vessel.

c. Where adjacent nozzles are ring type joint, manhole facing shall be small tongueand groove with the groove on the manhole flange.

d. Flange finish if not specified on PDVSAs representative drawings or Data Sheetshall meet the requirements of ASME B16.5.

e. Bolt holes of bolted connections shall straddle the natural horizontal and verticalcenterlines for horizontal vessels and the vertical and northsouth centerlines forvertical vessels.

f. Vent and drain nozzles shall be sized as specified on PDVSAs representativedrawing and Vessel connections may not be less than 2(see paragraph 5.11.1).

4.10 Inspection and Access Openings

4.10.1 The location, quantity, and size of manholes shall be specified to ensure that allinterior areas are accessible as required. Additional manholes over and above theminimum requirements of the respective division of Section VIII of the ASMECode, shall be provided in vessels for installation and removal of vessel internalssuch as fractionating trays, moisture separators, etc.

4.10.2 Manholes shall be usable from a ladder, platform or grade

4.10.3 Manholes shall normally be 24 nominal pipe size and shall be provided withbolted cover and davit or hinges for handling, except where larger manholes arerequired for installation of internals or similar purposes.

4.10.4 Manholes shall be equipped with either a davit or hinge to facilitate handling of theblind flange

4.10.5 Handholes shall be a minimum of 6nominal size. Studded pad or nozzle type maybe used and shall be provided with a bolted cover. Minimum external projectionfor nozzle type shall be used.


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steel corrosive elements. On such case, Manufacturer shall obtain PDVSAs

representative approval.Gaskets:

5.2.6 Gasket specified shall be supplied by the manufacturer unless otherwisespecifically noted.

5.2.7 For pressures less than 30 kg/cm2(400 psi) and temperatures between30

C (20 F) and 340 C (650 F) the use of compressed gaskets 1/16thick inaccordance with ASME B16.21 is recommended.

5.2.8 Over 340 C (650 F) and/or 30 kg/cm2 (400 psi) spiral wound gaskets, inaccordance with ASME B16.20, shall be used.

5.2.9 Use Teflon impregnated gaskets for temperatures below30 C (20 F).

5.3 Skirt for Stainless Steel or HighAlloy Vessel

5.3.1 Per subtitle 5.18.2.5 of PIP VECV1001, Vessel Design Criteria ASME CodeSection VIII, Division 1.

6 FABRICACION

6.1 General

6.1.1 The thickness of plate used for shell and heads shall beminimum.6.1.2 Shell plates shall be laid out so there will be a minimum of welded seams. For

vessels having more than one course, longitudinal joints shall be staggered.

6.1.3 Longitudinal and circumferential seams of shells, all seams in spherical shells andbuiltup heads shall be located to clear openings, theirs reinforcing pads, saddlewear plate, tray and insulation support rings. When any case mentioned above isunavoidable, the seam shall be ground flush and examined prior to welding.

6.1.4 External shell attachments such as platform clips, pads, pipe support and guideclips shall be provided as required.

6.1.5 Reinforcing pads shall be provided with atapped telltale hole located at 90off the longitudinal axis of vessel.

6.1.6 When required, opening shall be reinforced for new and cold, as well as forcorroded condition.

6.1.7 Vessels to be insulated shall be provided with insulation supports as required inaccordance with Engineering Design Standard PDVSA 10603.2.404InsulationSupports for Vertical VesselsHot Serviceand A2.224 Insulation Supports forHorizontal VesselsHot Service.
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6.1.8 When required, vessels shall be provided with lifting lugs.

6.1.9 The PDVSAs representative shall approve necessity for and location of liftinglugs.

6.1.10 Vessels provided with manholes, liquid level controls or relief valves 12 feet abovegrade, shall be equipped with caged ladders and platforms.

6.1.11 Ladder and platform lugs shall be shopwelded to the vessel.

6.1.12 Where vertical vessels require insulation, fabricator shall furnish and installsupport rings.

6.1.13 Reinforcing rings may also be utilized in supporting insulation.

6.2 Welding

6.2.1 Vessels shall be designed on the basis that pressure holding welds shall normallybe full penetration double welded butt joints.

6.2.2 Internal shell attachments such as deck supports angles, lugs, clips and seatsshall be designed to be welded to the vessel shell or head by continuous filletwelds.

6.2.3 The layout of seams shall be, to the maximum extent possible, such that thelongitudinal seams are not within the downcomer area of trays or behind anyobstruction that prevents inspection of these welds.

6.2.4 Welding procedures shall conform to ASME code, Section IX, manufacturerswelding procedure and qualification records shall be submitted for approval ofPDVSA upon receipt of purchase order. Welding shall not be performed prior topurchasers order approval of welding procedure and qualification.

6.2.5 Vessels shall be welded by fusion arc process.

6.2.6 Pressure holding seams shall be normally full penetration double welded buttjoints.

6.2.7 Where double welded butt joints are not practical, full penetration welds shall be

made by GTAW or GMAW process.6.2.8 Backing strips are only permitted for small diameter vessels when the second side

or back side of the weld is not accessible. The backing strips shall benonconsumable.

6.2.9 Nozzle attachment welds shall be of the full penetration type.

6.2.10 Unless internal piping is required, all drain nozzles shall be flush with inside ofvessel. Other nozzles may not extend more than 12 mm inside vessel and mustbe contoured to shell and rounded.


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PDVSA D211

Pgina 11


6.2.11 Weldedin baffles or decks for vessels 1.200 mm (40) diameter or larger, shall

have integrally flanged edges and shall be welded to the vessel by a continuousfillet weld at the flanged edge.

6.2.12 Skirt and other attachment welds should have complete fusion for full length andbe free from undercut, overlap or abrupt ridges or valleys. Either magnetic particleor dye penetrant inspection of root pass shall be done. A final dye penetrant ormagnetic particle inspection is to be done after PWHT.

6.2.13 All external supports, support rings, pads, and structural brackets attached to thevessel shall be seal welded all around to prevent corrosion between the vesseland attachments. When seal welding all around is not practical, provision fordrainage shall be made; e.g., a gap in the lowpoint weld.

6.2.14 No welding shall be allowed within the any place where proper visual inspectionof the weld is impossible.

6.2.15 Radiographic examination shall be performed when required by the ASME Code.

6.3 Internals

6.3.1 Trays shall be furnished by tray fabricator and installed by vessel manufacturer.

6.3.2 Tray support rings and downcomer bolting bars shall be furnished and installedby vessel manufacturer.

6.3.3 On vessels with internals, where a vessel manhole is not located in the top head,internal rigging clips shall be provided to facilitate handling of the internals.

6.3.4 An external Davit for lifting the removable internal components shall be provided.

6.3.5 Vessels internals and all portions of each vessel shall be selfdraining andselfventing to ensure complete elimination of liquid and vapors from the vesselwhen drained and vented.

6.3.6 The tray fabricator shall submit complete shop details, including installationinstructions and packing list, to purchaser for approval and transmittal to vessel

fabricator.

6.3.7 Trays shall be designed for a uniform live load of 14.88 kg/m2(10 psfpoundsover square foot) or the weight of water setting, whichever is greater, and for aconcentrated live load of 111 kg (250 lbs).

6.3.8 At the design loading the maximum deflection of trays shall not exceed:

a. Up to 3 m (10 ft) diameter3,2 mm (1/8 inch)

b. Larger than 3 m (10 ft) diameter4,8 mm (3/16 inch)


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6.3.9 The minimum thickness of internal plateworks and support rings shall not be less

than 6,4 mm (

inch).6.3.10 Internal flanges shall be ASME Class 150lb slipon type or fabricated from plate.

6.3.11 Carbon steel internal flanges shall be fastened with carbon steel squaredheadmachine bolts and square nuts tackwelded to the flanges to avoid loosening.

6.3.12 Removable internals shall be made in sections that can be removed through themanholes.

6.3.13 Removable internals shall not be provided with corrosion allowance.

6.3.14 For openings connected to pump suction, a vortex breaker shall be provided.

7 INSPECTION

7.1 Purchaser reserves the right to inspect the vessels at any time during fabricationto assure that the vessel materials and workmanship are in accordance with thisspecification.

7.2 The approval of any work by the purchaser s representative and his release of avessel shall not relieve the manufacturer of any responsibility for carrying out theprovisions of this specification.

8 POSTWELD HEAT TREATMENT (PWHT)8.1 No welding shall be performed on vessel after PWHT without written specific

approval of PDVSAs representative.

8.2 No service bolting shall be subjected to PWHT.

8.3 No service bolting shall be subjected to PWHT.

8.4 Removable internals shall be installed after stress relieving.

9 HYDROSTATIC TEST PRESSURE9.1 A Hydrostatic test pressure shall be maintained for an adequate time to permit a

thorough inspection, in any case not less than 60 minutes.

9.2 The vessel shall be not painted prior to the pressure test.

9.3 If field assembly/erection is involved, the final hydrostatic test shall be on theUsers site. The manufacturer shall provide the Purchaser a detailed testprocedure for review prior to testing.


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9.4 Horizontal vessels designed to support a full weight load of water shall be tested

while resting on its supports saddles without additional supports or cribbing.

9.5 Tall vertical vessels may be shop tested in the horizontal position. These vesselsmust be adequately supported during the test to prevent damage.

9.6 No welding, burning or grinding of pressure resisting weld shall be performed onvessels that have been pressure tested and stamped unless approved by the user.This includes, but not limited to, welds for shipping attachments, refractory orinsulation clips, stiffeners, spiders, or grinding for surface preparation.

10 PNEUMATIC TEST10.1 Per subtitle 7.2, Pneumatic Test, of PIP VECV1001, Vessel Design Criteria

ASME Code Section VIII, Division 1.

11 NAMEPLATE

The completed vessel shall be provided with a nameplate securely attached to thevessel by welding.

12 PAINTING AND MARKING12.1 External surfaces, excluding machined surfaces, shall be given a coat of primer

paint when specified on PDVSAs representative vessel drawing.

12.2 Surface preparation, painting, and painting material shall be in accordance withthe Engineering Specification Painting Material and Application Requirements,PDVSAO201.

12.3 Piece marking or other lettering on vessels fabricated of austenitic alloys shall bedone with paints or inks which contain nonmetallic pigment.

12.4 The purchase order number and vessel number shall be prominently marked onthe side of the vessel as shipped with white paint in block letter at least 300 mmhigh. The same applies to the vessel empty weight, which shall also be paintedon the surface of the vessel.

12.5 Vessels which have been post weld heat treated shall be prominently marked ontwo sides of the vessel with white paint in block letters at least 300 mm high asfollows:
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PDVSA D211

Pgina 14


PWHT Do Not Burn or Weld

12.6 All vessels with nonmetallic linings shall be prominently marked on two sides ofthe vessel with white paint in block letters at least 300 mm high as follows:

Lined Vessel Do Not Burn or Weld

12.7 Before shipping painting shall be complete as required by the purchasespecification.

13 SHIPMENT

13.1 After final hydrostatic test, vessels shall be dried and cleaned thoroughly insideand outside to remove grease, loose scale, rust and dirt.

13.2 All flange faces and other machined surfaces shall be coated with a readilyremovable rust preventative coating and properly protected against damageduring shipment.

13.3 All flanged openings which are not provided with covers, shall be protected bysuitable steel plates.

13.4 The vessel internals not installed in the vessel by the Seller shall be crated, boxed

and loaded to protect all parts from damage or loss in transit and shall be shippedso they arrive at the erection site prior to or with vessel. All internals shall beproperly identified in accordance with the packing list.

13.5 Gaskets and bolting shall be supplied and boxed separately for each vessel andproperly identified for field installation by others.

13.6 One spare gasket shall be supplied for each connection for which cover plates arefurnished.

13.7 Suitable temporary supports, marked and tagged for removal after vessel

installation, shall be provided for internal parts not separately shipped to preventdamage during shipment.

13.8 Austenitic stainless steel used in vessels shall not be exposed to wetting by saltwater or salt spray. The PDVSAs representative shall approve protective coatingor covering used to prevent such exposure.

13.9 For internal protection of steam drums, after thoroughly drying, desiccant bagsshall be provided. The desiccant shall be activated alumina or silica gel. All bags


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PDVSA D211

Pgina 15


shall be secured to prevent shifting during shipment. A warning notice to remove

the desiccant before placing the unit in operation shall be placed on each manholecover. After placement of desiccant, all connections and openings shall becovered with tight fitting sheet metal enclosures and all openings shall be carefullysealed with an adhesive backed waterproof cloth tape. Sealing shall be adequateto prevent air from entering the unit during the shipment and storage.

13.10 Small parts, which are to be shipped loose, shall be bagged or boxed and markedwith the order and item number of the vessel.

13.11 Vessel fabricator shall take all necessary precautions in loading by blocking andbracing the vessel and furnishing all necessary material to prevent damages.

14 REPORTS

14.1 When each vessel is released for shipment, bound copies containing the followingreports and data sheets, each properly and individually identified, shall besupplied by the Seller to the PDVSAs (number of copies required per table ofdocuments required included in purchase order).

14.2 Sellers data sheet (code form). (ASME Code, Section VIII, Div. 1 Appendix W)or (Div. 2 Appendix I) or as specified.

14.3 Complete sets of assembly and shop detail drawings showing all actualdimensions of the vessel as fabricated and shipped; all drawings to be stampedCertified as Built. All drawings shall be reproducible.

14.4 Certified Material Record Report showing location, heat numbers, chemicalanalysis and physical properties of all materials used in the fabrication of thevessel.

14.5 Report of tests made on welded vessel test plates, if any such tests are made.

14.6 Photostatic copy of the temperaturerecording chart obtained during thermalstress relief, including the cycle of heating, soaking and cooling.

14.7 Photostatic copy of the hydrostatic test pressure chart.

14.8 Copy (rubbing) of nameplate.

14.9 Records of radiographic inspection.


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14.10 Copy of Certificate of Authorization.

14.11 Complete set of all mechanical calculations for all components of each vessel,indicating used mathematical formulas and indicating relevant ASME Codeformulas and source paragraphs, values used in the formulas, the calculatedresults and comparison with acceptable values. Where a calculation software hasbeen used, the program description shall be given, including name and version.Print outs shall include:

14.12 ASME Code calculations

14.13 Wind and earthquake calculations, as applicable

14.14 Support calculations

14.15 Calculations associated with lifting and erection of the vessel.

14.16 Nozzle load analysis for local and gross effect, when required.

14.17 Design of attachments, internal and external.

14.18 Fatigue analysis as applicable services.

14.19 A detailed list of this PDVSAs specification exceptions.

15 GUARANTEE

15.1 Manufacturer shall guarantee that the vessel fulfills all conditions as stated in thisSpecification and that it is free from fault in design, workmanship and material.

15.2 In case of design or fabrication defects arise during the first year of operation, theManufacturer agrees to make all necessary alterations, repairs and replacementsfree of charge to PDVSA.

d-211 diseño y fabricacion especificaciones

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