Project Management in the Oil and Gas Industry
Download 1.92 Mb. Pdf ko'rish
|
2.Project management in the oil and gas industry 2016
7.4.3.2 Submittal
Data The submittal data are usually the shop drawings, samples, performance data, and usually all the deliverable materials required test data results or Letters of Certification. The review of submittal data is one of the first steps in the quality control process. The information received from subcontrac- tors and suppliers for items to be installed into the project must be verified to meet the standards set forth in the contract documents. Items such as dimensions (thickness, length, shape), ASTM standards, test reports, per- formance requirements, color, and coordination with other trades should be reviewed and verified carefully. Checking submittal information is important, especially when shop drawings are checked. Because the con- tract drawings do not provide enough detailed information to fabricate material, vendors and suppliers must make shop drawings. Materials that require shop drawings include concrete reinforcement, structural steel, cabinets/millwork, and elevators. Basically, any item that is fabricated off-site is required to have a shop drawing in the submittal information. It is the information provided on the approved shop drawings that the fabricators use to “custom-make” their materials. Therefore, each item on the shop drawings must be verified against the contract plans and specifications. Once the submittal data is meticulously reviewed whether it is a set of shop drawings or some other form of submittal data, a determination on whether or not the data should be “approved” or “disapproved” must be made. The General Contractor reviews submittals and they are given over to the consultant engineer for further review. If the data is “disapproved” or 222 Project Management in the Oil and Gas Industry incomplete, the originator of the submittal data must resubmit correct or additional information. A submittal (set of submitted information for a proposed material/equipment) that completes the review process is used as the “template” by which the material is fabricated. Any mistakes not discovered in the submittal review process will lead to potential problems involving extra cost and additional time for correction. The Kansas City Hyatt Regency walkway collapse in 1981 is an example of how a poor shop drawing review can lead to disastrous consequences. In this case, a change in the details of structural connections left unchecked during the submittal process, basically doubled the load on the fourth floor walkway connections. This extra load on these connections led to the collapse of the fourth floor suspended walkway onto the second floor walkway and then onto the ground floor below. This disaster led to around 114 deaths and over 200 injuries. 7.4.3.3 How to Check Incoming Materials Once submittal information is checked against the contract requirements and approved, it is filed for future reference. Many companies file submit- tals in reference numbers. Verifying that incoming material meets contract requirements is accom- plished by using the data shown in the submittal information. The infor- mation found on the delivery tickets or the manufacturer’s information provided with the shipment is compared to the information given in an approved submittal. If all information is correct, then the material can be approved for off-loading to the storage site. Take care that any “unapproved” material that is allowed to be stored on- site has the possibility of being included in the construction process and leads to rework or other corrective action. Therefore, it is important that each item coming onto the site is verified to comply with the contract requirements. 7.4.3.4 Methods of Laying Out and Checking Work The layout of work and the verification of correct placement, orientation, and elevation of work are extremely important. Work that is not placed correctly will lead to an extra cost for rework. For example, the misplace- ment of anchor bolts for the foundation will lead to expensive correction work and delays. In addition to checking work, the proper layout of work is also required. The required tools needed to perform this function include the use of a tape measure, plumb bob, carpenter’s level, and a chalk box. Topics to discuss for the proper layout and checking of work include checking elevations at The History of Graphene 223 the height of concrete footing during placement and finishing the grade and floor. Methods to check for proper alignment of work in the field man- ufacturer’s recommendations for the layout of certain items are windows, overhead door, and air-handling units. Since quality control is the responsibility of everyone involved in the construction process, most of the engineers in construction positions will help to manage QC functions. Since it is not always clear what one needs to find in order to ensure a proper inspection, engineers should be instructed to watch for «key items” during inspection. Download 1.92 Mb. Do'stlaringiz bilan baham: |
Ma'lumotlar bazasi mualliflik huquqi bilan himoyalangan ©fayllar.org 2024
ma'muriyatiga murojaat qiling
ma'muriyatiga murojaat qiling