To ensure that the complete design documents and drawings conform in a consistent and proper manner with Engineering Standards, a procedure for checking and approval is necessary .Official checkers are not appointed. Rather, the section leader can help arrange for qualified personnel to check design and/or drawings of peers.
Any and all drawings leaving the design office for fabrication and/or construction are to be checked for:
2.1 Plant design, equipment arrangements, major equipment selection, flow diagrams, systems, layouts and circuitry .This is generally the duty of supervision who, with the assistance of senior personnel, check these aspects on a continuous basis from the initial stages of design.
2.2 Stress design, component arrangement and relationship, and adherence to applicable codes, etc. This is normally done by senior design personnel appointed at the discretion of the supervisor .
2.3 Dimensions, geometry, fabrication practice, installation clearances, adherence to Drafting Standards, projection, orientation, clarity of presentation, references, notes, drawing titles, key plans, etc. This is done by any design/drafting personnel qualified and as the need arises.
Upon completion of drawings, one print of each to be obtained for checking purposes by appropriate personnel assigned by the supervisor. The "checker" uses the red/yellow method (yellow for correct, red for error}. All rerllarks in red shall be clear and concise. All contentious and highly opinionated matters should be cleared up and the supervisor will arbitrate in cases of disagreement.
The person who produced the original drawing will correct it according to the checked print, carefully crossing out with green all revised items.
Signatures
5.1. New Drawings
When all items have been revised, the person who checked the drawing originally shall indicate his satisfaction by signing on the line "checked by" in the drawing title.
The individual responsible for the design enters his/her initials in the approval box, thus signifying approval.
Finally, each drawing shall be reviewed and signed in the reviewed block (by the appropriate section leader or designate.)
The drafts person enters all initials in the appropriate boxes on the drawing.
5.2. Revisions
Each revision must be initialed as having been reviewed and approved for design content. The drafts person enters all initials in the appropriate boxes on the drawing.
6. CHECK LIST FOR DRAWINGS
PRIOR TO SUBMITTING THE DRAWING FOR APPROVAL, THE DRAFTSPERSON SHOULD VERIFY ITS FORMAT AND CONTENT BY USING THE FOLLOWING "CHECK LIST".
6.1. Drafting
1. Is title in accordance with Standard 0803-0.2.011 ?
2. Is drawing numbered correctly?
3. Is date in accordance with Standard 0803-0.1.011 ?
4. Are all necessary reference drawings listed?
5. Is latest revision encircled and are all previous revision markings removed?
6. Is key plan shown in accordance with Standard 0803-0.4.011 ?
7. Is north arrow shown in accordance with Standard 0801-0.1.011 ?
8. Is orientation of main plans correct? Do part plans and sections have similar orientation? See Standard 0801-0.1.011.
9. Are sections and elevations taken the correct way? See Standard 0803-0.4.011.
10. Are any detail or section numbers or letters duplicated? THEY SHOULD NOT BE!
11. ls the break between addition and existing clearly shown?
12. Existing steelwork, walls, equipment, etc. should be shown in "long dash". See Standard 0803-0.4.011.
13. Does the word "New" appear? IT SHOULD NOT! See Standard 0803- 0.4.011.
14. Are drawings thoroughly dimensioned in accordance with Standard 0803- 0.4.011.
15. ls drawing dimensionally correct?
16. Does presentation, numbering and lettering conform to Drafting Standard No. 0803-0.5.011?
6.2. Design Content
1. Does item meet approved specifications in all details?
2. Has all equipment been thoroughly reviewed with Plant Operations and Maintenance Departments.
3. Have standard details been checked against standard sheets?
4. Has it been checked against the flow sheet?
5. Can item be properly fabricated with information shown?
6. Can item be erected with information shown?
7. Has it been checked against general arrangements?
8. Has it been checked against concrete drawings?
9. Has it been checked against structural drawings?
10. Has it been checked for interference with mechanical services, i.e. pipes, ducts, trays, etc.?
11. Has it been checked against vendor's prints of connected manufactured equipment?
12. Can item be successfully operated as designed?
13. Has sufficient access been provided to operate and maintain the item?
14. Does the equipment meet the criteria for Fail safe/Clean Plant Design/Total Quality Improvement?
6.3. Information
1. Are references complete and used as checks on design?
2. Do notes refer to paint, etc. ?
3. Is Bill of Material complete, and has it been checked against specifications and design drawing carefully?
4. Can item be properly purchased with information shown?
5. Are all repurchased items clearly indicated and labelled with correct requisition numbers?
6. Is the FULL extent of the contractor's responsibility clearly defined?
7. Is the work to be carried out by "Inca" forces labelled precisely and not just called up "by Inca"? This last phrase should NOT appear -rather a "Work Order Number" or similar should indicate just how this work is to be performed.
6.4. Approvals
1. Where applicable. does the design-drawing provide sufficient detailed information to obtain approval from various departments and external government agencies as required in Standard 0202-1.1.010.