SECTION 23 71 01
SHOP FABRICATED CARBON STEEL PRESSURE VESSELS
PART 1 GENERAL
1.1
1.2
SUMMARY
A.
Section Includes:
1.
Requirements to furnish and install pressure vessels.
2.
The term code as used herein refers to the ASME Boiler and Pressure Vessel
Code, Section VIII, Division 1 (latest edition).
B.
Related Sections:
1.
Section 23 00 01 - Basic Mechanical Requirements.
2.
Section 40 42 33 – Equipment and Piping Insulation.
DESIGN CRITERIA
A.
Design vessels and vessel supports for site applicable seismic and wind load criteria
depending on installation location (indoors or outdoors).
1. Manufacturer shall confirm (via calculations/analysis) dynamic stability for vertical
vessels when:
a.
Ratio of height-to-diameter ratio is greater than or equal to 15.
b.
Ratio of shell radius-to-shell thickness is greater than or equal to 200, or
c.
Natural period of vibration is greater than 0.4 seconds.
2.
Wind Loading:
a.
Multiply the projected area of the windward face of vessels by the
following shape factor:
b.
MAY 2024
Surface
Shape Factor
Flat
1.0
Cylindrical
0.6
Spherical
0.6
Multiply the projected area of the windward face of vessels by the
following increase factor to account for nozzles, piping, ladders, and
platforms:
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Outside Diameter of Insulation or Shell
Increase
Factor
D less than 915 mm (36 inches)
1.50
915 mm (36 inches) less than or equal to D less than
1.37
1,370 mm (54 inches)
B.
1.3
1,370 mm (54 inches) less than or equal to D less than
mm (78 inches)
1.38 1,980
1,980 mm (78 inches) less than or equal to D less than
mm (102 inches)
1.20 2,590
2,590 mm (102 inches) less than D
1.18
Spherical storage vessels (any diameter)
1.10
Pressure, Temperature & Corrosion allowance:
1.
Operating pressure and temperature conditions and required pressure rating
are specified on the data sheets. Manufacturer is responsible for determining
appropriate vessel design parameters from this data.
2.
Design Pressure:
a.
Internal design pressure at the top tangent line shall be at least 10
percent above the highest normal operating pressure or 1.7 atm (25
psig), whichever is greater.
b.
Design vessels for potential future field hydrostatic testing of 1.5 times
the design pressure measured at the top head calculated without vessel
shell and head corrosion allowance thickness. Maximum induced stress
at any point of the vessel shall not exceed 90 percent of the yield stress
for the material used.
3.
Corrosion allowance shall be at least 1.5mm.
SUBMITTALS
A.
Section 01 33 00 – Submittal Procedures: Requirements for submittals.
B.
Refer to the Submittal Schedule at the end of Part 3 for a list of submittal requirements
for this Section.
1.4
DELIVERY, STORAGE, AND HANDLING
A.
MAY 2024
General:
1.
Clean each vessel thoroughly inside and outside to remove grease, weld
splatter, scale, slag, rust, and other foreign matter.
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2.
3.
To prevent damage during shipment, protect flange facings by securely fastened
metal covers. Covers shall be a minimum of 6 mm (1/4 inch) thick and installed
with a full-face rubber gasket using a minimum of four full-diameter bolts.
Tape/seal the cover and flange for protection from water.
Provide steel or steel-reinforced timber construction shipping saddles
contoured to fit with sufficient contact surface to prevent damage or
permanent distortion to the vessel assembly. Minimum contact arc length shall
be 120 degrees. Provide auxiliary removable spiders, struts, bands, and/or
stiffening rings where required to reinforce relatively thin-shell and/or heavy
vessels to prevent damage during handling and transporting.
B.
Marking:
1.
Clearly identify vessels or sections of vessels by painting or dye stenciling the
purchase order number and vessel number in a conspicuous location on the
shell, head, or support.
2.
Specify on the fabrication drawings that vertical vessels are to be marked on the
base and first foot of skirt, clearly indicating the north, south, east, and west
coordinates. The coordinates shall be indicated with a painted line and letter
for each according to orientation. The marking may be made on the shell near
the bottom tangent line if the vessel is supported on legs or lugs.
C.
Mark horizontal vessels with one end marked north, south, east, or west to indicate
vessel orientation.
PART 2 PRODUCTS
2.1 ACCEPTABLE MANUFACTURERS (Refer to the approved vendors list)
2.2
GENERAL
A.
Furnish vessels complete as shown on data sheets and vessel drawings including
necessary bolts, nuts, gaskets, internals and internal piping.
B.
Manufacturer shall bid a standard vessel design in conformance with the code that may
vary somewhat in detail from the data sheets and drawings. Where specific details are
included on the data sheets and drawings, manufacturer shall conform to the details
shown.
C.
Furnish gaskets and external bolting for manways, handholes, and other openings that
call for a blind flange or cover.
D.
Furnish one spare gasket for each manway.
E.
CFD Analysis
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2.3
FABRICATION
A.
Shell and Heads: The head types used shall be determined by the manufacturer based
on the most economical case that meets the specified design conditions unless
otherwise specified on the vessel data sheet and drawing in the applicable equipment
section.
B.
Attachments:
1.
Shall be continuously welded to the outside surface of the vessel. Where
backup pads are used they shall be vented with a 6 mm (1/4-inch)-diameter
hole that is drilled, tapped, and plugged:
2.
3.
Attachments include:
a.
Clips/brackets for ladders, platforms, railings, pipe supports, and guides.
b.
Sockets and guides for davits.
c.
Lifting lugs.
d.
Insulation supports and welding studs or blank nuts for fireproofing.
e.
Other special brackets as required.
Lifting Lugs:
a.
Manufacturer’s design made of the same material as the vessel.
b.
Designed to allow for lifting the vessel either vertically or horizontally
and at any angle.
C.
Nozzles:
1.
Only flanged nozzles are allowed on internally lined vessels.
2.
Only threaded couplings are allowed where threaded nozzles are required.
3.
Flanges shall be oriented such that the bolt holes straddle the vertical centerline
of the vessel and/or a radial line on the vessel head.
4.
Nozzle radial projection shall be measured from the outside of the vessel to the
finished face of the flange.
5.
Nozzle elevations shall be measured from the bottom of the support skirt/legs.
6.
Nozzle locations are subject to change until vessel fabrication drawings have
been reviewed and approved by TA.
D.
Postweld Heat Treatment: Postweld heat treated vessels shall be clearly marked as
follows: "POSTWELD HEAT TREATED. DO NOT BURN OR WELD ON THIS
VESSEL". This requirement shall be shown on vessel fabrication drawings.
E.
Lined vessels shall be clearly marked as follows: "LINED VESSEL. DO NOT BURN OR
WELD ON THIS VESSEL". This requirement shall be shown on vessel fabrication
drawings.
F.
Support Legs: The support legs shall be designed for the loads stated and a minimum of
a full hydro test.
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2.4
2.5
G.
Connections: Flanges shall be orientated such that bolt holes straddle the vertical
centerline of vessel and a radial line on tank top.
H.
Gaskets and external bolting shall be furnished by the manufacture for all manways.
FINISHES
A.
The vessel exterior steel shall be sandblasted, primed, and painted per the requirements
of the attached data sheets. Paint system shall be an electrostatic powder coat epoxy.
A color sample shall be approved by TA prior to final application.
B.
The vessel interior surface shall be coated as required in the data sheets.
SPARE PARTS
A.
2.6
Provide two spare gaskets for each flanged connection.
SOURCE QUALITY CONTROL
A.
Hydrostatic Testing:
1.
Manufacturer shall hydrostatic test vessels per procedure and method required
by the code, even if Code U stamp is not required.
2.
Lined/internally-coated vessels shall be tested prior to lining/coating. Vessels
shall not be retested after completion of lining/coating.
3.
Internally polished or cleaned vessels shall be tested prior to polishing/cleaning.
Vessels shall not be retested after completion of polishing/cleaning.
B.
Perform visual and radiographic examination of vessel fabrication as prescribed by the
code, even if Code U stamp is not required. Provide all documentation, results,
certificates, etc. for testing and examinations performed thereof to Owner.
Radiographic film shall be subject to Owner’s review if requested.
C.
Vessel shall be subject to Owner’s inspection at any time during its fabrication within 24
hours’ notice.
D.
Notify Owner a minimum of 10 days prior to final inspection and testing. Hydrostatic
test shall be subject to witnessing and review by Owner.
PART 3 EXECUTION
3.1
INSTALLATION
A.
MAY 2024
Contractor shall review manufacturer’s submittal information and shall coordinate final
dimensions and locations of foundations, pads, anchor bolts, adjacent equipment, etc.
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3.2
3.3
B.
Install vessels in accordance with the manufacturer’s recommendations and the related
specifications and Contract documents.
C.
Correct piping, attachment, or other signs of improper installations that cause stresses
to be transferred to the vessel.
D.
Furnish and install a duplicate vessel identification label if label provided by
manufacturer is not clearly visible after vessel installation.
FINAL INSPECTION
A.
Inspect vessel prior to commissioning and startup and notify Owner of material or
workmanship that is not in conformance with this Specification or the code.
B.
Vessels shall be installed as shown on the Drawings. If vessel nameplate is not clearly
visible, a duplicate nameplate containing the information on the original nameplate shall be
installed in a clearly visible location adjacent to the tank.
SUBMITTAL SCHEDULE
ITEM NO.
SUBMITTAL REQUIREMENT
AS INDICATED
43 41 14-01
Provide the following (itemized for each
vessel):
•
Overall vessel dimensions including
diameter and side-shell height.
•
Complete materials of construction
(including gaskets and bolts).
•
Vessel design parameters (including
design pressure and temperature,
hydrotest pressure, etc.).
•
Shell plate thickness.
•
Head type and thickness.
•
External and internal painting/coating
materials.
•
Vessel weight (empty).
•
Vessel warranty conditions.
•
Copy of ASME certificate of
authorization.
Per Construction Schedule
MAY 2024
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43 41 14-02
MAY 2024
The details for all items required for
shipment, such as shipping saddles, special
bracing, attachment of saddles to vessels,
etc.
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ITEM NO.
SUBMITTAL REQUIREMENT
AS INDICATED
43 41 14-03
Provide the following vessel fabrication
drawings including:
•
Complete dimensional and fabrication
details for all components.
•
Shell and heads materials and thickness.
•
Nozzle details showing types, sizes,
locations, etc. Nozzle identification
scheme shall be identical to that of the
data sheets and drawings.
•
Weld Details:
•
Sizes and type of filler metal by
AWS/ASTM classification. Show welding
procedure identification number in the
tail of all pressure part welding symbols.
•
Locations of circumferential and
longitudinal welded joints.
•
External and internal painting/coating
materials, preparation, and application
procedures.
•
Packing details including items required
for shipment, such as shipping saddles,
special bracing, attachment of saddles
to vessels, etc.
Per construction schedule
43 41 14-04
Complete design calculations required by the
code that are stamped/sealed by an engineer
registered in the state of project jurisdiction.
Complete vessel design data sheet including
materials of construction, design parameters
(including maximum allowable working
pressure, test pressures, joint efficiencies,
corrosion allowance, etc.), heat treatment
details, weights, etc. Data sheet format
should be manufacturer’s standard.
Per construction schedule
43 41 14-05
MAY 2024
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43 41 14-06
MAY 2024
Anchor bolt criteria, including quantity,
material, diameter, length, and required
embedment depth. Provide anchor bolt
template for bolts that are required to be
cast in-place.
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ITEM NO.
SUBMITTAL REQUIREMENT
AS INDICATED
43 41 14-07
Recommended installation procedures.
Per construction schedule
43 41 14-08
Provide the following prior to vessel
shipment:
•
A copy of manufacturer's data report
Form U-1 or Form U-1A.
•
A photograph or a clear and legible
rubbing of the nameplate.
•
Mill test reports and material
certifications required by the code.
•
Radiographic examination and other test
results/certificates.
Per construction schedule
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DATA SHEET FORMAT
Equipment
Tag number
__________
__________
Quantity
__________
P&ID sheet numbers
__________
System
__________
Fluid
__________
Type(s)
__________
Phase
__________
Density
__________
Specific Gravity
__________
Design Conditions
Capacity
__________
Design Temperature
Minimum
__________
Maximum
__________
Working Pressure (max)
__________
Vacuum Rating
__________
Pressure Rating
__________
Orientation
__________
Materials and Construction Details
Materials
Tank*
__________
Lid*
__________
Fittings*
__________
Gaskets*
__________
Lining/Cladding*
__________
Insulation*
__________
Fireproofing*
__________
Dimensions
Side Shell Height*
__________
Diameter*
__________
Corrosion Allowance
__________
Minimum Wall/Plate Thickness
__________
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Tank Bottom*
Sideshell*
____mm (____in)
____mm (____in)
Roof*
____mm (____in)
Weights
Shipping Weight*
____kg (____lb)
Gross Weight*
____kg (____lb)
Requirements
Ladder
__________
Maintenance Platform
__________
Lifting Lugs
__________
Hold-Downs
__________
Paint
__________
Manway
__________
Ventilation
__________
Grouting
__________
Domed Top
__________
Top Railing
__________
Galvanized External
__________
Galvanized Internal
__________
Relief Valve
__________
Tank Skid
__________
Insulation
__________
Dimensions*
____m (____ft)
Connection Schedule:
Nozzle
Type
Size
Rating
Facing
Description or Service
A
B
C
D
E
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Inspection and Test:
Factory or Field Test
Test Procedure
__________
Performance
__________
Pressure
__________
Vibration
__________
Supplier Requirements
Dismantle/Inspect After Test
__________
Repair Procedure Approval
__________
ASME/API/Code Certification
__________
Material Certification
__________
Leak Detection
__________
* Manufacturer supplied information shall be submitted with this data sheet or a
standard submittal.
END OF SECTION
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