Measurement You Can Defend
Petroleum measurement is more than taking a reading. It depends on accepted procedures, trained personnel, traceable equipment, and records that can withstand commercial, operational, and regulatory review.
Artwork by Anne Walker Brackett.
Standards Leadership
API & ASTM Petroleum Measurement Standards
For generations, W.L. Walker has supported the petroleum measurement standards work behind accurate tank gauging, temperature determination, density measurement, sampling, centrifuge testing, and custody transfer.
Field Measurement Practice
W.L. Walker equipment is used in the same field environments addressed by API MPMS, including tank gauging, temperature determination, sampling, density measurement, and sediment and water testing.
Laboratory & Test Methods
ASTM petroleum standards support many of the test methods and instrument practices used to connect laboratory measurement, field equipment, and custody transfer calculations.
Early Standards Involvement
Arthur L. Walker helped establish the Walker family’s long-running involvement in petroleum measurement standards and practical field equipment for the oil and gas industry.
Decades of Committee Service
- 40+ years of standards involvement
- Former Chair, API MPMS Chapter 7
- Contributor across API COMQ and COLM
- Participant in ASTM petroleum measurement work
Continuing the Work
- Active in API COLM and COMQ
- Chair, API MPMS Chapter 7.1
- Vice Chair, API MPMS Chapter 10
- Contributor to temperature, density, and field measurement work
Standards We Work With Most:
API MPMS Chapter 7 for temperature determination, Chapter 3 for tank gauging,
Chapter 8 for sampling, Chapters 9 and 10 for density and hydrometer-related
measurement, and Chapter 10 methods related to sediment and water by centrifuge.
These standards help connect field practice, laboratory testing, and commercial
custody transfer.
Our Ongoing Commitment:
Standards continue to evolve as instruments, software, sampling practices, and custody
transfer expectations change. W.L. Walker remains engaged so our equipment, service,
and technical support stay connected to the measurement practices used by the petroleum
industry.
Looking for API, ASTM, or Measurement References?
Visit our Industry Resources page for links to API terms and definitions, Measurement Library references, API standards, and ASTM petroleum standards.
Upcoming Standards Meetings
API & ASTM Committee Events
Upcoming petroleum measurement, petroleum products, and temperature measurement standards meetings relevant to W.L. Walker’s work in field measurement, laboratory equipment, gauging, thermometry, hydrometers, and custody transfer.
2026 Fall Committee on Petroleum Measurement Standards Meeting
October 12–16, 2026
Hyatt Regency Austin
Austin, Texas
Austin, Texas
API committee meeting focused on the development and maintenance of petroleum measurement standards, including field and laboratory measurement practices.
View API EventD02 June 2026 Committee Week
June 21–25, 2026
Hyatt Regency McCormick Place
Chicago, Illinois
Chicago, Illinois
ASTM D02 covers petroleum products, liquid fuels, and lubricants, including standards connected to petroleum testing, fuel quality, and laboratory practices.
View ASTM D02 EventE20 Temperature Measurement Meeting
November 2–3, 2026
November 2026 Committee Week
Location per ASTM schedule
Location per ASTM schedule
ASTM E20 focuses on temperature measurement standards, including thermometers, resistance thermometers, digital contact thermometers, and related practices.
View ASTM E20 ListingD02 December 2026 Committee Week
December 6–10, 2026
Renaissance Orlando at SeaWorld
Orlando, Florida
Orlando, Florida
The December D02 meeting continues ASTM petroleum products, fuels, lubricants, and related technical committee standards work.
View ASTM D02 Listing
Note: Meeting schedules, registration links, hotels, and committee agendas
may change. Always confirm final details directly with API or ASTM before making travel plans.