FORM BHAC2002-07-16 Rev. 8

Process Safety Management Inquiry
PreliminaryRE-EVALUATION OF HAZARDOUS AREA CLASSIFICATION request form

Company Name / Project Sponsor
Project Name / Project Manager
Requested By / Project Number
Best Contact Number / Best Contact Email
Date / Bath Project No:

Project Description:

*Note If Equipment is Replacement In Kind

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Preliminary H.A.C. Assessment Due Date:

Information required from clientforRe-evaluation of Hazardous Area Classification (HAC):

1)Preliminary Scaled plot plans: These drawings should reflect the proposed process equipment/building location. The drawings are generated using a copy of Master Unit Plot Plan(s). This copy should not be modified (enlargements or scale changes of original copy of Master Plot Plan .dwg file).

2)Current Process Flow Diagrams: Drawings should show stream numbers that correlate with data in heat and material balance stream numbers.

3)Heat and Material Balance: Information should include for each stream flow rates, pressures, temperatures, and composition in pure components. These streams need to be related by stream number to the PFD’s. This data is used by Bath in gas/vapor dispersion modeling.(If possible the material balance information needs to be in a MS Excel electronic file).

4)Project specific Process & Instrumentation Diagrams (P&ID’s): These documents define equipment names, numbers, and set the scope for the HAC Assessment Project. (PDF copies preferred.)

5)Material Safety Data Sheets (MSDS): Each MSDS should be assigned to the appropriate process stream or process equipment.

Deliverables from Bath Engineering to Client (in a PDF file format):

1)Preliminary HAC Area Classification drawings which include but are not limited to:

a)Plan Drawings referenced to the scaled plot plan background/base map provided.

b)Enlarged Plan Drawings (used where the area is congested with process equipment). Drawing is referenced back to the Preliminary Plot Plan drawing/s.

c)Elevation Drawings (when there is a multi-level process structure with different process equipment at each level). Plan drawings are also included for each structural level.

d)Drawings that contain equipment details, tables, notes, and legends

2)Preliminary Hazardous Area Classification Assessment Report: A detailed audit proof document covering the assessment having the following sections:

Executive Summary

Section A General Considerations

Section BIdentification of Point Sources of Emissions

Section CPhysical Properties of Materials BeingHandled, Processed, or Stored

Section DClassification Rational

Section ESpecial Exceptions

Section F List of Area Classification Drawings

Section GStream MESG Calculations

Section HGas Dispersion Modeling Graphs and Plots

Section I Building Matrix (if applicable)

  1. Plot Plan Modification :

Create or update existing scaled Master Unit Plot Plans. [YES] or [NO]

  1. Project Information Required To Prepare an Engineering Fee Estimate for Preliminary and Final Hazardous Area Classification Studies

Available / Preliminary HAC Assessment Study Basis / Final HAC Assessment Study Basis
Yes / No / N/A / Qty. / Notes / Yes / No / N/A / Qty. / Notes
1.Current/Updated Scaled Plot Plans?
1a. Is a field verification of current scaled plot plans required for this project?
2.Project specific Process Flow Diagrams?
3.Project specific Heat and Material Balance Information?
3a. In MS Excel?
4.Project specific Process & Instrumentation Diagrams (P&ID’s)?
5.Material Safety Data Sheets?
6. Other: (i.e. Isometric drawings, pump spec sheets, etc.)

III.Reference bhac40 for final hazardous area classification assessment requirements and project deliverables.

IV.Please email above information in pdf format to . This information is required for bath to complete a cost estimate.

Terms for this Change Authorization

Based on the information above, Bath Process Safety Management will estimate the number of hours and cost for professional services required. A written proposal complete with specific terms and conditions will be provided. Approved by:

For / Date / For Bath Process Safety Management / Date

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