Engineering Services
Scope of Work or Project Execution Plan
With the TWRF group we will meet with you as our client to determine your projects design. This is the work that needs to be accomplished to deliver you a positive result with the specified features and functions that you have requested. Sometimes the scope may change and we can visit the design again and review any trend able hours due to any changes made.
Front End Engineering Design
The FEED is basic engineering which comes after the Conceptual design or Feasibility study. The FEED design focuses the technical requirements as well as rough investment cost for the project. The FEED can be divided into separate packages covering different portions of the project. The FEED package is used as the basis for bidding the Execution Phase Contracts (EPC, EPCM, etc) and is used as the design basis. A good FEED will reflect all the clients’ project specific requirements and avoid significant changes during the execution phase. FEED Contracts usually take around 1 year to complete for larger sized projects. During the FEED phase there is close communication between Project Owners and Operators and the Engineering Contractor to work up the project specific requirements.
Cost Estimates
At the TWRF group we can produce the instrumentation cost estimate of your project. The cost estimate will include all instrumentation equipment associated with the project. The instrumentation equipment cost estimate will have a single total value and will have identifiable component values. Any instrumentation cost estimate will also have all the potential delivery dates as well as a RISK REGISTER to view any potential long lead items that will cause the projects schedule to change.
Process & Instrumentation Diagrams
These drawings are usually different for all clients. At TWRF consulting we like to typically use symbology and information from ISA 5.1. If you have your own symbology sheet will are more than capable of using your information. A tagging philosophy is also very important. Some clients have them and others don’t. But either way it is very important to get the tagging scheme complete as soon as possible, as changes can have major effects on a project down the road.
Instrument Index
At the TWRF group we have a few types of instrument index templates. All clients are different and like to see different headings and even a different order of the headings. So during the feed stage we can iron out these issues and create an instrument index that you are happy with. Usually an instrument index will have all the hard and soft tags in it. Hard tags are actual equipment like a control valve. Soft tags are parts of the hard tags that communicate with the PLC or DCS like a valves position switch. You will also have information like valve size, instrument power requirements, set points, manufacturer, model number and vendor.
Detailed Engineering Design
Once we have finished a front end engineering design package for our clients we will get into the detailed engineering design. This will take all the information from or FEED proposal and fine tune it. We will run through the P&ID’s, instrument index and cost estimate to make sure our clients want to continue with the project at hand.
Alarm & Shutdown Tables
During detailed design the instrumentation team will develop an alarm and shutdown table for the commissioning team for when the facility is ready to operate. The programmers use the table along with many other documents to help the start the plant.
Level Tables
Again level tables are developed near the end of the detailed design phase to again help the commissioning team program and calibrate all the level transmitters. These level tables can be really handy to help with all the vendor vessel drawings and the bridal drawings.
HAZOP & LOPA
A hazard and operability study or Layers of Protection Analysis is a structured and systematic examination of a planned or existing process or operation in order to identify and evaluate problems that may represent risks to personnel or equipment, or prevent efficient operation. The HAZOP technique was initially developed to analyze chemical process systems, but has later been extended to other types of systems and also to complex operations such as nuclear power plant operation and to use software to record the deviation and consequence. A HAZOP is a qualitative technique based on guide-words and is carried out by a multi-disciplinary team (HAZOP team) during a set of meetings.
Material Requisition Packages
At the TWRF group, a request for quotation (RFQ) is a standard business process whose purpose is to invite suppliers into a bidding process to bid on a specific product or service. An RFQ typically has Information like payment terms, quality level per item and contract length. To receive correct quotes, RFQs will include the specifications of the items to make sure all the suppliers are bidding on the same thing. Logically, the more detailed the specifications, the more accurate the quote will be and comparable to the other suppliers. Another reason for being detailed in sending out an RFQ is that the specifications could be used as legal binding documentation for the suppliers. The suppliers have to return the bidding by a set date and time to be considered for an award. Discussions may be held on the bids (often to clarify technical capabilities or to note errors in a proposal). RFQs are best suited to products and services that are as standardised and as commoditised as possible, as this makes each suppliers’ quotes comparable. An RFQ allows different contractors to provide a quotation, among which the best will be selected. It also makes the potential for competitive bidding a lot higher, since the suppliers could be quite certain that they are not the only ones bidding for the products.
Technical Evaluation
The TWRF group will take the different quotations from vendors After the submission deadline. We will go through the process of opening, examining, and evaluating these bids to determine the bidders' responsibility, responsiveness, and other factors associated with selection of a bid for the instrumentation equipment to be awarded. TWRF will determine the strengths and weaknesses of all bidders based on the project requirements. This will allow us to choose the best suitable vendor for the job based on price, delivery time, commercial requirements and technical expectations.
Purchase Orders
After finishing your bid evaluation we will choose a vendor based on price and delivery time. Sometimes you as our client will already have a preferred vendor or AVL (Approved vendor list). We will create all the necessary purchase order documents and compile a package for each instrumentation vendor.
Control Narrative
Typically the TWRF group will work with the projects process engineer to create a control philosophy. This document will usually outline how the facility, pipeline or terminal will operate. This document will lay out all the control equipment like tank levels, control valves and pumps. The shutdown key will be derived from the control philosophy.
Shutdown Key
TWRF has a shutdown key template that we can use to map out all the alarms and emergency shut down situations. This information along with the P&ID’s will be used by the programmer during the commissioning stage.
As-Building Services
TWRF has a field operations department which allows your facility to stay up to date for insurance purposes and to also have the proper drawings and information at your finger tips with any new equipment or piping changes that have been made over the years. Facilities are always growing, changing and expanding so let us help you keep your sites up to date with the latest P&IDs, Piping drawings, Shutdown keys and Control Narratives.