General Introduction
TLY Energy and Defense Industry Inc. provides end-to-end engineering, design, manufacturing, installation, integration, and commissioning services for flow measurement systems used in industrial facilities.
Our product range includes primary flow measurement elements operating on the differential pressure principle, as well as flow restriction and pressure-reduction solutions. Correct product selection and sizing are critical to measurement accuracy, system reliability, and long-term stability.
Product Range
1. Orifice Plate
Orifice plates are primary measurement elements widely used for flow measurement based on the differential pressure method.
TLY Energy and Defense Industry Inc. provides engineering, calculation, manufacturing, and installation services in accordance with the applicable requirements of ISO 5167-2, API 14.3/AGA-3, and ASME MFC-3M.
Types: Concentric, eccentric, segmental, and quadrant-edge orifice plates
Materials: AISI 316/316L, Monel, Inconel, Hastelloy, and project-specific alloys
Applications: Steam, natural gas, water, and process liquids
Options: Designs compatible with single- or dual-chamber orifice fitting systems
2. Multi-Hole Orifice Plate
Thanks to their specially designed hole geometry, multi-hole orifice plates can contribute to obtaining a more stable differential pressure signal in certain applications involving low Reynolds numbers or disturbed flow profiles.
TLY Energy and Defense Industry Inc. offers application-specific designs by optimizing hole geometry to improve measurement repeatability and reduce flow-induced noise.
Advantages: Improved flow-profile conditioning, low signal noise, and application-dependent reduction in permanent pressure loss
Design: Custom engineered according to the project specification, verified calculation methods, and relevant flow measurement principles
3. Meter Run
Meter Run systems are measurement assemblies, particularly for pipelines of DN 50 and below, in which the orifice plate, pressure-tapping connections, and calculated straight pipe sections are integrated into a single measuring unit.
TLY Energy and Defense Industry Inc. manufactures high-accuracy Meter Run systems that incorporate the required straight pipe lengths into the measurement station.
Standards: ISO 5167-2 and ASME MFC-3M
Manufacturing: CNC machining, dimensional tolerance control, surface roughness measurement, and use of materials supplied with EN 10204 3.1 inspection certificates
Applications: Natural gas, process gases, test systems, and laboratory applications
4. Flow Nozzle
Flow nozzles are differential-pressure-based primary measurement elements used for flow measurement under high-velocity, high-temperature, and high-pressure conditions.
Depending on the application, they may provide lower permanent pressure loss and a longer service life than orifice plates.
Standards: ISO 5167-3 and ASME MFC-3M
Types: ISA 1932 Nozzle, Long Radius Nozzle, and Venturi Nozzle
Applications: Steam, gas, and liquid pipelines
Advantages: Suitable for high velocity and pressure, stable measurement, and long service life
Measurement Performance: Accuracy and measurement uncertainty are determined according to product geometry, process conditions, installation, and calibration data
5. Wedge Flow Element
Wedge flow elements are differential-pressure-based elements suitable for measuring high-viscosity, particulate-laden, slurry, or contaminated fluids.
TLY Energy and Defense Industry Inc. manufactures wedge flow elements using materials with high resistance to wear and corrosion, selected according to process conditions.
Standard: Design based on ASME MFC-14M
Advantages: Low risk of blockage, low maintenance requirements, and operation over a wide Reynolds number range
Applications: Crude oil, slurry flows, viscous liquids, and wastewater systems
6. Pitot Tube
Pitot tubes determine dynamic pressure and flow velocity by using the difference between the static and total pressure of the fluid.
TLY Energy and Defense Industry Inc. provides design, installation, commissioning, and calibration services for single-point and averaging-area Pitot tubes.
Standards: ISO 3966 and ASME PTC 19.5
Applications: Air lines, flue-gas ducts, and large-diameter piping systems
Advantages: Low permanent pressure loss, easy installation, and cost-effective measurement
7. Venturi Tube
Venturi tubes are differential-pressure-based flow measurement elements used in applications requiring low permanent pressure loss and high measurement stability.
TLY Energy and Defense Industry Inc. designs Venturi tubes in accordance with the applicable requirements of ISO 5167-4 and ASME MFC-3M.
Types: Classical Venturi, Short Form Venturi, and Machined Venturi
Materials: Stainless steel, carbon steel, and project-specific alloys
Applications: Water, steam, gas, and chemical process lines
Advantages: Low permanent pressure loss, high process reliability, and long service life
8. Restriction Orifice
Restriction orifices are process elements used to limit flow rate or create a controlled pressure drop.
TLY Energy and Defense Industry Inc. designs single- or multi-stage models according to process parameters such as inlet and outlet pressure, fluid properties, temperature, noise, and cavitation risk.
Design: Based on project calculation criteria, process specifications, and ASME B31.3 piping requirements
Types: Single-stage and multi-stage restriction orifice systems
Applications: Pressure reduction, flow balancing, minimum-flow, bypass, and auxiliary line applications
9. Dual Chamber Orifice Fitting
Dual-chamber orifice fitting systems allow the orifice plate to be replaced while the process line remains pressurized, provided that appropriate operating and safety procedures are followed.
Depending on the process conditions, this design can reduce the need for line shutdowns or eliminate the requirement to take the line out of service during plate replacement.
Standards: API 14.3/AGA-3 and the relevant measurement principles of ISO 5167
Pressure Classes: ASME Class 150–2500, depending on the project and product model
Nominal Size Range: DN 50–DN 600, depending on the project and product model
Body Materials: Carbon steel, stainless steel, and project-specific alloys
Applications: Refineries, natural gas metering stations, petrochemical plants, and power stations
Main Advantages:
Replacement of the orifice plate without shutting down the process line
Shorter maintenance time and lower operating costs
Long-lasting sealing system
Design compliant with applicable product and project standards
Engineering and Service Scope
Design and Calculation
Differential pressure calculations, β-ratio selection, Reynolds number analysis, measurement uncertainty assessment, and straight pipe length calculations are performed according to the applicable requirements of ISO 5167, API 14.3/AGA-3, and ASME MFC-3M.
Manufacturing
CNC-controlled manufacturing, dimensional tolerance and surface roughness inspections, hydrostatic testing, non-destructive testing methods such as PT, RT, and UT, and materials supplied with EN 10204 3.1 or 3.2 inspection certificates are used.
The applicable testing and inspection methods are determined according to the product type, material, pressure class, and project specification.
Installation and Integration
Preparation of pressure-tapping connections
Installation of impulse lines
Manifold installation
Differential pressure transmitter integration
Compatibility with HART, Modbus, and PROFIBUS communication systems
Integration with PLC, DCS, and SCADA systems
Commissioning and Calibration
Field inspections, transmitter calibration, zero and span adjustments, leak-tightness checks, and functional tests are performed.
Calibration and verification services may be provided by laboratories accredited within the scope of ISO/IEC 17025, depending on project requirements.
Project Management and Documentation
General arrangement drawings
P&ID documents
Isometric drawings
Bills of materials
Calculation reports
Welding and non-destructive testing documentation
FAT and SAT reports
Quality dossiers
Operation and maintenance documents
All technical documentation required within the scope of the project is prepared in full.
Compliance with Standards
TLY Energy and Defense Industry Inc. designs and manufactures flow measurement elements in accordance with the applicable sections of the following standards, depending on the product type and project requirements:
ISO 5167 series: Flow measurement using differential pressure devices
API 14.3/AGA-3: Measurement of natural gas using orifice metering systems
ASME MFC-3M: Measurement of fluid flow using orifice plates, nozzles, and Venturi tubes
ASME PTC 19.5 and ISO 3966: Flow measurement using Pitot tubes
ASME MFC-14M: Wedge flow element design
ASME B31.3: Process piping systems
ASTM and EN standards: Material, manufacturing, inspection, and testing criteria
TLY Energy’s Capabilities
Turnkey engineering solutions for flow measurement systems
In-house design, manufacturing, and system integration capabilities
System design using ATEX- and IECEx-certified components according to project requirements
Solutions supporting SIL 2 requirements through suitable components and system architecture
PLC, DCS, and SCADA integration
Comprehensive technical support for EPC projects, from field installation to commissioning
Experienced engineering team
National and international project management experience
