ENERGY FLOW SYSTEMS, INC.
Houston, Texas — Flow Meters in Service Since 1964

Flow meters built the way they used to be. To spec, to code, to last.

Custom venturi tubes, flow nozzles, and orifice plates for the refineries, pipelines, and municipalities that measure what matters.

Request a Quote The Product Line
ASME U & R Stamped Every Meter Calibrated Shipped Worldwide
direction of flow
Plate No. 1 — The Classical Venturi Tube Energy Flow Systems, Houston

In Service With

The Catalog

Every piece custom-engineered.

No. 1

Venturi Tubes

Low-loss, ASME-type, and FRP designs, sized to spec through 48-inch line sizes and beyond. Our flagship since 1964.

4–6 Week Lead
No. 2

Flow Nozzles

High-velocity steam and feedwater service — flanged or weld-in, built and flow-tested to ASME recommendations.

3–4 Week Lead
No. 3

Orifice Plates & Flange Unions

Paddle and RTJ plates, holders, and complete flange unions to AGA, ASME, and ISA — cut, stamped, and shipped in days.

Ships 2–4 Days
No. 4–10

Meters, Vessels & Accessories

Meter runs, integral flow orifice assemblies, wedge and PD meters, ASME pressure vessels, launchers & receivers, straightening vanes, and more.

Full Line →
Why They Come Back
“Relationship, trust, and experience. Seventy percent of our orders come from people we've already served.”
— Jay Patel, Owner
The Code Shop

ASME U & R stamped.

Inspection and manufacturing procedures conform with ASME and ANSI power piping and refinery codes — including flow meters meeting many nuclear power plant requirements. Micrometer inspection records, hydrostatic testing, and weld X-raying available on request.

Calibration

Every meter, calibrated.

Each flow meter is calibrated before it ships — and we calibrate and re-certify existing meters, ours or anyone else's, so your measurement stays defensible. About calibration →

Correspondence Invited

Send us your specification.

Line size, flange rating, service conditions — a real engineer reads every request, and every quote is custom, because every piece is.

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