Civil and Structural Scope of Work in Petrochemical Project

This article is about Civil and Structural Scope of Work in Petrochemical Project related to Civil Design and Site Work in Plants and Petrochemical Plants as per International Procedures, Codes & Standards. Here furthermore will be discussed about Codes, Standards, and Specifications for civil work, Specific Requirements for Building HVAC Design, Site Topographical and Geotechnical Survey, Civil Loading Diagram, Building Layouts,  Structural Design Criteria and Standard Details, Civil Engineering Calculations, Civil Design Drawings (Plans, Sections, and Details) in Plant and Petrochemical Plants.

ivil and Structural Scope of Work in Petrochemical Project, Civil Design and Site Work, Codes, Standards, and Specifications for civil work, Specific Requirements for Building HVAC Design, Site Topographical and Geotechnical Survey, Civil Loading Diagram, Building Layouts,  Structural Design Criteria and Standard Details, Civil Engineering Calculations, Civil Design Drawings (Plans, Sections, and Details)

Civil and Structural Scope of Work in Petrochemical Project

1.  Scope

1.1      The scope of the civil and structural engineering and design work to be performed by the ENGINEERING CONTRACTOR will depend upon the project strategy and will generally belong in one of the two scope categories that follow:

    • Complete detailed civil and building design with complete detailed structural design.
    • Basic civil and building design with complete detailed structural design.

1.2  The ENGINEERING CONTRACTOR shall refer to the contract scope to understand which scope category is appropriate for the specific project and which particular areas of the plant are within their scope. The contract scope will provide further information on who is responsible for reinforcing bar and embedment design and detailing; anchor bolt design and detailing; and specification charts for the reinforcing bar/embedment, anchor bolts, and grout to be used.

1.3  The ENGINEERING CONTRACTOR shall be responsible for cooperating with Company to obtain and coordinate all necessary equipment, structural and piping loading, and dimensional data within their plant areas to enable the development of the civil and structural designs.

1.4  Complete Detailed Civil and Building Design with Complete Detailed Structural Design

    • The ENGINEERING CONTRACTOR shall be responsible for the detailed civil design for all areas of the plant. This shall include all new foundations, drainage, underground piping, roads, paving, and landscaping. It may also include the design and routing of a fire water main system with hydrants valves, etc.
    • In addition, the ENGINEERING CONTRACTOR shall be responsible for the detailed design of any buildings associated with the work. This may include electrical substation buildings, control and administration buildings, compressor houses/acoustic enclosures, and ancillary buildings such as security gate houses, etc. The ENGINEERING CONTRACTOR shall design the buildings to suit local building convention and shall ensure that they meet local building regulation requirements. They must also be fit for purpose (allowing for normal maintenance work) for the life expectancy of the plant. The building design shall include building services such as HVAC (heating, ventilation, air conditioning), lighting and small power requirements, and sanitary drainage. Building finishes (e.g., sanitary equipment, wall, floor and ceiling finishes, doors, windows, office partitions) shall also be included
    • The ENGINEERING CONTRACTOR shall be responsible for the basic and detailed structural steel design work associated with the plant areas that have been assigned to them. This shall include the design and detailing of pipe-racks, pipe support frames, equipment and maintenance access platforms, ladders, and stairs that are included within those plant areas. It shall not include fabrication and erection drawings, which will be done by the steel fabricator. See above paragraph. The ENGINEERING CONTRACTOR shall do a general review of the fabrication and erection drawings done by the steel fabricator for completeness and content.
    • The ENGINEERING CONTRACTOR shall include the structural steel in the CAD 3-D model of their portion of the plant.

1.5  Basic Civil and Building Design with Complete Detailed Structural Design

    • On certain projects, the contract will dictate that the detailed civil and building designs will be provided either by a local engineer contractor (LEC) appointed by Company or by the client.
    • In these circumstances, the ENGINEERING CONTRACTOR shall remain responsible for the basic and detailed structural steel design work as in paragraph above, but shall be responsible for only the basic civil and building design associated with areas of the plant that have been assigned to them. The basic civil and building design shall include the preparation of foundation loading diagrams, the schematic layout of buildings, and elevated concrete structures. These layouts and diagrams shall include and/or reference all information necessary to enable the LEC to provide the detailed civil and building designs.

2.  Codes, Standards, and Specifications

2.1  General

The ENGINEERING CONTRACTOR is permitted to use their own company design standards and specifications in the development of the designs and specifications for the civil and structural works associated with the facility. However, the ENGINEERING CONTRACTOR shall comply with the Company engineering standards, specifications, and standard drawings that have requirements relating to plant facilities and that are given in the contract scope.

2.2  Design Codes

    • The ENGINEERING CONTRACTOR shall design structures to locally approved design standards and specifications for the parameters and methods to be used to determine the earthquake and wind loading on structures.
    • The default structural design codes shall be the following.

AISC

Manual of Steel Construction

ASCE 7

Minimum Design Loads for Buildings and Other Structures

2.3  Company Civil/Structural Design Standards

The Company standards listed in the contract scope appendix shall be used in conjunction with local/national design codes and standards. Additional Company standards may be required by the contract scope and will be listed there.

2.4  Specific Requirements for Building HVAC Design

    • Heating, ventilation, and air-conditioning design for the buildings shall be completed to internationally recognized standards for the climatic requirements stated in the project- specific scope of work. The ventilation and air conditioning for analyzer rooms and other rooms that have a potential asphyxiation risk shall conform to the requirements in 3ES80101.
    • This Company standard requires a greater number of air changes for analyzer rooms than for control rooms. A split room HVAC system design may be more cost effective. A re-circulating HVAC system is not permitted in the analyzer room because asphyxiating gases may be present. All exhaust ducting from the analyzer room shall discharge to atmosphere. Ventilation system running and warning lights shall be included per 3ES80101. A ventilation failure alarm volt-free contact shall be provided and wired to the Programmable Electronic System (PES).
    • Ventilation Design Conditions (Controlled)
Temperature Max 22°C (72°F) dry bulb

Min 18°C (65°F) dry bulb
Fresh air rate Minimum 6 or 9 air changes per hour for analyzer room depending on the volume

3. Company Deliverables to the Engineering Contractor

3.1  General

This section provides a description of the drawings and documents that will be issued by Company to the ENGINEERING CONTRACTOR as the basis for the civil, building, and structural design work to be performed by the EC. The ENGINEERING CONTRACTOR shall refer to the contract scope to confirm the work to be done.

3.2  Plot Plan/Facility Arrangement

This drawing establishes the general location of all equipment, roads, buildings, property lines, substation, battery limit tie-ins, electrical interface, and major pipe racks.

3.3  Site Topographical and Geotechnical Survey

Company will provide the ENGINEERING CONTRACTOR with the available geotechnical reports, topographical surveys, and drawings for the site. If information is not available or is not of sufficient quality, Company will commission further investigations and surveys. If the new plant is to be located within an existing facility or be on another industrial site, Company will try to obtain drawings and details of existing structures, foundations, and services drawings for them and adjacent to the proposed plot and issue these to the EC.

3.4  Civil Loading Diagram

Company will issue to the ENGINEERING CONTRACTOR associated civil loading diagrams for the piping design for plant areas in which Company is responsible for the piping design. These drawings will specify the loadings to be used in the design of the foundations and will enable the ENGINEERING CONTRACTOR to do the detailed civil design. Loading described or referenced on these drawings represents the forces and moments at the top of the foundation from dead, live, wind, and seismic loading. These drawings dimensionally locate and identify all anchor bolts required to connect the equipment and structures to the foundation. The drawings reference supplier equipment arrangement and foundation loading drawings that provide specific loading and details for specific items of equipment. The civil loading diagrams will also indicate process water drainage gully positions and associated fluid type, temperature, and flow rate together with electrical and earthing cable duct positions required to be cast within/beneath foundations.

3.5  Equipment and Structural Documents

Equipment and structural drawings (referenced on the civil loading diagrams) giving dimensional and loading details of equipment located within the plant areas for which Company is responsible will be issued to the ENGINEERING CONTRACTOR for their use in the detailed design of foundations.

3.6   Building Layouts

If the ENGINEERING CONTRACTOR is responsible for the detailed design of buildings, Company will provide schematic building layouts defining the arrangement and internal sizes of rooms and data relating to any process plant equipment that is to be housed within the buildings. Company will also provide any specific requirements for the buildings such as architectural treatments, finishes, equipment access requirements, etc.

3.7   Structural Design Criteria and Standard Details

Company will provide the ENGINEERING CONTRACTOR with a structural design basis statement that documents the structural design criteria that shall be used on the project. The criteria may include design codes, material grades, etc. This will help to ensure a consistent structural design basis for all areas of the plant. Similarly, Company will issue pertinent standard structural steel details for use across the plant.

4.  Deliverables From the Engineering Contractor

4.1  General

4.1.1   This section provides a description of the drawings and documents that shall be produced by the ENGINEERING CONTRACTOR and issued to Company as the detailed design work is performed. Other documents may be also be added.

4.2  Engineering Calculations

    • A “civil/structural engineering design criteria” document shall be created and submitted at the start of civil engineering design activities. This document shall provide pertinent codes, specifications, standards, and assumptions related to the EC’s specific scope of work. This document shall be reviewed and approved by Company.
    • If responsible for the detailed design, the ENGINEERING CONTRACTOR shall prepare and submit calculations for all foundations, structures, and underground services to Company. Building HVAC calculations shall also be prepared and submitted. Company will review the calculations. Company’ Review of these calculations does not relieve the ENGINEERING CONTRACTOR of responsibility for the accuracy and integrity of the design. Any local design criteria, design guides, seismic and wind loading criteria used by the ENGINEERING CONTRACTOR in the performance of the design work shall also be submitted to assist Company’ review. Any references to design guides or codes shall be clearly shown in the calculations. Calculations shall be in English. Any computer-generated analytical calculations shall be fully prefaced with design data and loading criteria used together with a brief design philosophy statement.

4.3  Design Drawings (Plans, Sections, and Details)

    • The ENGINEERING CONTRACTOR shall prepare civil construction drawings in sufficient detail to enable a competent civil contractor to do the civil construction work. The drawings shall comprise, but not necessarily be limited to, site arrangement drawings, foundation general arrangement drawings, reinforcement placement drawings, standard detail drawings for drainage, paving roads, etc. Specification charts for reinforcing bar bending, anchor bolt use, and grout use shall also be prepared by the EC.
    • Structural steel design drawings shall be produced in sufficient detail so that structural steel fabrication and erection drawings can be prepared by a steel fabricator. In general, shop- fabricated structures shall be welded construction, and field-erected structures shall have bolted connections.
    • Building finishes and building services drawings shall be produced to define and detail all work required to complete the construction and finishing of the buildings.
    • The ENGINEERING CONTRACTOR shall completely check and approve drawings before submitting them to Company for final review. Drawings and other documents shall be certified and/or stamped by a professional engineer or similar agency when required to meet local, regional, and/or federal regulations and/or the contract scope. Generally, Company will review the drawings for accuracy, completeness, ease of construction, and safety.
    • When the detailed civil design is not included in the EC’s scope, the ENGINEERING CONTRACTOR shall produce civil loading diagrams containing sufficient information for an external party to be able to complete the civil design for the areas within the EC’s scope. The standard format and content of these drawings shall be similar to those described in paragraph (Design Drawings (Plans, Sections, and Details).

4.4  Material and Workmanship Specifications

If responsible for the detailed civil and building design, the ENGINEERING CONTRACTOR shall produce and supply material and workmanship specifications that shall be applicable to the scope of the associated construction work. Locally available materials and equipment shall be specified for use by the site contractor if possible and appropriate. Copies of these specifications shall be issued to Company for review and approval at the beginning of detailed design.

Scope of Work in Petrochemical Project related to Project Management

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