Gas Measurement

These FAQs, segmented by major operational areas, provide a summary of the most commonly asked customer service and technical support questions.

Statements for previous (closed) months are available through the Web Report Warehouse (online) system at www.coastalflow.com/Core-Services/Web-Report-Warehouse/. If you need account access to Web Report Warehouse or would like to request copies of reports, please contact our Customer Service Department by email at [email protected], or by phone at 800-231-9741 or 281-282-0622.

Statements for previous (closed) months are available through the Web Report Warehouse (online) system at www.coastalflow.com/Core-Services/Web-Report-Warehouse/. If you need account access to Web Report Warehouse or would like to request copies of reports, please contact our Customer Service Department by email at [email protected], or by phone at 800-231-9741 or 281-282-0622.

The Report Scheduler in FLOWCAL sends out individual emails to all people set up in a distribution list. If you see multiple email addresses on a report distribution, it is being performed manually. If you need to verify who else is receiving a given distribution, please contact our Customer Service Department by email at [email protected], or by phone at 800-231-9741 or 281-282-0622.

For differences between field volumes and Coastal Flow volumes, please contact our Customer Service Department by email at [email protected], or by phone at 800-231-9741 or 281-282-0622.

For differences between check meter and sales meter volumes contact the Gas Sales Verification Department at 800-231-9741 or 281-282-0622. If the sales point is not one for which Coastal Flow is providing gas accounting or Check-versus-Sales verification, you will need to provide a copy of the monthly Sales Meter measurement statement to begin this process.

The MMBtu found on measurement statements is calculated as the sum of the daily MMBtu. Each day’s MMBtu is rounded to a whole number and summed for all the days in the month. This procedure is specified by industry standard (API M.P.M.S. 21.1) and can generate a rounding discrepancy that is up to plus-or-minus 15 MMBtu per month. If you need further clarification, please contact a technical service representative at 800-231-9741 or 281-282-0622.

Labels can be ordered by calling our Chart Department at 800-231-9741 or 281-282-0622.

Please contact our Chart Department at 800-231-9741 or 281-282-0622.

Please contact our Chart Department at 800-231-9741 or 281-282-0622.

ChartsPens, Envelopes, etc. can be ordered by calling our office at 800-231-9741 or 281-282-0622.

Please contact our Customer Service Department by email at [email protected], or by phone at 800-231-9741 or 281-282-0622.

Please contact our Customer Service Department by email at [email protected], or by phone at 800-231-9741 or 281-282-0622.

Yes. To make arrangements, please contact our Customer Service Department by email at [email protected], or by phone at 800-231-9741 or 281-282-0622.

For EGMs (electronic gas measurement; i.e., flow computers) we need the complete monthly measurement logs from the flow computer in either the manufacturer’s original format or as a FLOWCAL-compatible .CFX file;

For Chart measurement processing, we need the original orifice meter charts;

For both EGM and Chart measurement, we need any equipment change reports, inspection and calibration reports, and the gas analysis to be used to produce the final volume and energy statements; and

Additional set-up information may be needed for new stations and to provide additional services such as gas sales verification, allocations, or gas balancing. Please contact our Customer Service Department by email at [email protected], or by phone at 800-231-9741 or 281-282-0622, to determine if you need to provide Coastal Flow with additional information.

We make every effort to accommodate our customers when such requests arise. However, we may not always receive the necessary information in time to provide an early close-out.

Coastal Flow can always apply updated analytic values back to previous month’s data. If the data has already been closed, consideration should be given as to how far into your production and revenue accounting process the originally closed data has gone and the impact on final quantities the analysis update will make.

Volumes on EGM data are rounded according to the methodology published in API M.P.M.S. 21.1. This standard requires that volume and energy be rounded to whole numbers for each gas contract day. Chart volumes are rounded in the same manner if split daily, or on a per-chart basis if no such split is required. If another methodology is required for your company’s process, please contact our Customer Service Department by email at [email protected], or by phone at 800-231-9741 or 281-282-0622.

Coastal Flow’s deadlines are your deadlines. That said, data should be provided as early as possible so that more time can be spent processing the data and ensuring the most accurate results possible. Normal processing requirements are at least three business days for EGM data and four business days for Chart data.  Faster close cycles can be requested, but may entail higher processing costs. Where possible, submitting data throughout the month rather than fully at the end of the month will speed up the process for both Charts and EGM. Late data submission may result in missing the normal close-out date.

Please notify a customer service representative as soon as possible whenever data will be submitted late so that Coastal Flow can properly schedule our work load and attempt to meet normal close-out dates. Data received after the close date may still be processed even if missing data is estimated, but this may result in prior period adjustments (PPAs) within your company’s processes. Your production and revenue accounting group(s) should be able to provide guidance on the impact of such adjustments.

Where possible, orifice plates should be sized so that the differential pressure (DP) is in excess of 20% of the calibrated range of the DP transmitter.  If the meter is to operate below 15 psig, then the design should target a DP of 20″ and the transmitter should be, at most, a 0-100″ range.

Whenever possible, orifice plates should be sized so that the Beta ratio (i.e., orifice diameter divided by meter tube I.D.) is between 0.2 and 0.6, to minimize measurement uncertainty.

Operations often involve additional considerations to properly size an orifice plate. For complex measurement situations (e.g., plunger-lift applications, erratic flow rates, etc.), please contact a technical service representative at 800-231-9741 or 281-282-0622. You will need to provide the following information:

  • Maximum flow rate;
  • Meter tube size;
  • Calibrated range of the differential pressure sensor;
  • Flowing pressure;
  • Temperature; and
  • Specific gravity of the gas.

Yes. Our sister company, Flow-Cal, has developed CALCit. CALCit provides field and office personnel with a convenient and accurate tool for calculating a flow rate or recommended orifice plate size. To learn more or to purchase CALCit, click this link www.flowcal.com/flowcal_products/calcit/ or call Flow-Cal directly at 281-282-0865.

This may be accomplished by using Flow-Cal’s CALCit program, if you have access to a copy of this software tool, or you may contact a Coastal Flow technical service representative at 800-231-9741 or 281-282-0622 for assistance. You will need to provide the following information:

  • Maximum flow rate;
  • Calibrated range of the differential pressure sensor;
  • Flowing pressure;
  • Temperature; and
  • Gravity of the gas.

Normally, the coefficient desired for field calculations is expressed as Mcf/day. The coefficient on Coastal Flow’s Monthly Gas Accounting Statement is in Scf/hour so it must be multiplied by a factor of 0.024.

The use of a coefficient can be confusing whether you use square root or linear charts and calculate hourly or daily volumes. We recommend contacting a Coastal Flow technical service representative at 800-231-9741 or 281-282-0622.  You will need to provide the following information:

  • Chart type (square root or linear);
  • Flowing pressure (psig or psia);
  • Temperature;
  • Specific gravity of the gas; and
  • Orifice plate and meter tube size.

©2021 Coastal Flow Liquid Measurement, Inc. and Coastal Flow Gas Measurement, Inc., entities of Quorum Business Solutions, Inc.

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