BQCIS

Ensuring Process Reliability Through Certified Pressure & Flow Measurement

In process industries, accurate measurement of pressure and flow is essential for safety, efficiency, and quality assurance. BQCIS Pressure & Flow Calibration delivers ISO/IEC 17025-accredited services that verify and adjust gauges, transmitters, and flowmeters against traceable standards.

Our calibration capabilities cover low-pressure vacuum devices to high-pressure systems exceeding 1,000 bar, and flow rates from a few mL/min to several m³/h. Calibrations are performed using precision dead-weight testers, piston gauges, laminar flow elements, and gravimetric flow benches.

BQCIS provides complete traceability to NIST and national metrology institutes, ensuring regulatory compliance, reduced downtime, and improved operational control.

Key Activities in Pressure & Flow Calibration

Pressure Gauge Calibration

Calibration of analogue and digital pressure gauges using reference standards with accuracies up to ±0.02 % FS.

Pressure Transmitter Verification

Cross-checking transmitters and sensors under controlled conditions with automated comparison benches.

Vacuum System Testing

Measurement and calibration of vacuum gauges and transducers down to 1×10⁻³ mbar.

Flowmeter Calibration

Calibration of positive-displacement, turbine, Coriolis, and ultrasonic flowmeters using gravimetric or volumetric methods.

Differential Pressure Devices

Verification of orifice plates, Venturi meters, and DP transmitters per ISO 5167 and API MPMS standards.

Leak & Integrity Testing

Pressure decay and helium leak detection to confirm sealing performance in pressurised systems.

On-Site Calibration

Portable pressure and flow calibration systems for field verification and process maintenance.

Documentation & Traceability

Issue of ISO/IEC 17025-accredited certificates with full uncertainty analysis and traceable reference chain.

Safety Relief Valve Testing

Verification of set pressure, reseat pressure, and leak tightness for critical safety relief valves.

Key Benefits of Pressure & Flow Calibration

Process Integrity

Process Integrity

Guarantees safe and reliable operation of pressure- and flow-critical systems through verified accuracy.

Regulatory Confidence

Regulatory Confidence

Complies with ISO/IEC 17025, API, OIML and ISO 5167 requirements across oil & gas, energy, and manufacturing sectors.

Measurement Traceability

Measurement Traceability

Ensures results are traceable to national standards, providing assurance during audits and inspections.

Cost Efficiency

Cost Efficiency

Reduces process losses and maintenance costs by maintaining optimal calibration intervals.

Success Story

Flowmeter and Pressure Instrument Calibration for Refinery Operations

The Challenge:

A petroleum refinery required ISO/IEC 17025 calibration of flow and pressure transmitters to maintain custody transfer accuracy and compliance with API MPMS standards.

Our Solution:

BQCIS conducted on-site calibration using gravimetric flow benches and high-pressure dead-weight testers, delivering fully traceable certificates within 48 hours.

The Result:

The client achieved improved metering accuracy, reduced fuel losses by 0.3 %, and passed the API surveillance audit with zero non-conformities.

View More Case Studies →