Classical Venturi Tubes
High-Precision Differential Flow Metering Solutions
Gulf Oil & Gas International is a premier global distributor and direct supplier of all types of Venturi Tubes. Engineered in strict accordance with client operational specifications and international standards, our Venturi tubes adhere primarily to ISO 5167, ASME, BS, and DIN 1952 design codes.
Our Classical Venturi Tubes cover all three standardized convergent configurations:
- Type A: Venturi tube with an 'as cast' convergent section.
- Type B: Venturi tube with a fully machined convergent section.
- Type C: Venturi tube with a rough-welded sheet-iron convergent section.
We supply Type B Venturis machined over the inlet and outlet sections across the entire operating range of ISO 5167. Type C Venturis feature a machined throat section coupled with sheet steel inlet and outlet cone sections. The throat section can be honed to achieve optimal surface smoothness. Heavy-duty Type C units are reinforced with structural stiffeners and equipped with integrated lifting lugs for easy installation.
Why Do We Use Venturi Tubes?
Venturi tubes are used to measure the flow rate of a fluid based on the physical principle of the Venturi Effect. This effect describes how the pressure of a fluid decreases as it accelerates through a constricted section of pipe. Primary engineering reasons for specifying Venturi tubes include:
- Exceptionally Low Energy Loss: Recovers up to 90% of differential pressure, dramatically lowering pumping power demands.
- High Durability & No Moving Parts: Ensures long-term maintenance-free operation under harsh process conditions.
- Non-Intrusive Measurement: Smooth internal contour prevents clogging, making it ideal for viscous fluids or slurries.
- Proven Industrial Value: Critical for municipal water treatment, oil transmission pipelines, and high-volume air duct metering.
Full Engineering & Custom Supply Capabilities
At Gulf Oil & Gas International, we provide Full Engineering design and supply 100% customized Venturi Tubes tailored to your exact process application and operational requirements. Whether your project demands specialized metallurgy for high-temperature/high-pressure steam, sour gas (H2S) service, custom bore calculations, or fast-track emergency deliveries, our engineering team handles end-to-end design, flow calculation verification, finite strength reporting, and precision supply.
Ordering Data & Engineering Specifications
Design Codes
- ISO 5167
- ASME
- BS
- DIN 1952
- Stoomwezen
Process Connections
- Welding nipples (Threaded / SW)
- Bosses
- Flanged
Configurations & Tappings
- Type A, B, and C
- Single or Double Tapping Sets
- Buttweld (BW) / Flanged Line Connections
Testing & Calculations
- 3rd Party Inspection Authority
- Strength & Bore Calculations
- Special Flow Calibration on Request
Comprehensive Metallurgy & Materials
We supply Venturi tubes in a full range of high-grade carbon steel, stainless steel, and special alloys:
- Carbon & Low Temp Steel: A105N, A350 LF2, A516 Gr. 60 / 65 / 70, A106 Gr. B, A333 Gr. 6
- Alloy Steel: A182 F5, F11, F22, F91, A335 Gr. P5 / P11 / P22 / P91
- Stainless Steel: A312 TP304/304L, TP316/316L/316Ti, TP321/321L
- Duplex & Super Duplex: A182 F51, A182 F91, 1.4462, UNS S32760
- Exotic Alloys: Monel 400, Hastelloy C22 / C276, Alloy 20, Titanium
Engineering Profile Diagrams & Technical Schematics
Drawing Technical Schematic: Detailed dimensional layout showing mean upstream diameter, throat bore diameter, pressure tappings, and overall length (L).
Target Industry Sectors & Applications
Our Venturi tubes are engineered for high-reliability flow measurement across heavy process infrastructure:
- Upstream Oil & Gas: High-volume crude pipeline flow metering, wet gas measurement, and offshore flare lines.
- Water Desalination & Treatment: Raw water intake regulation, municipal transmission pipelines, and chemical dosing lines.
- Power Generation & Steam Loops: High-pressure steam flow, main feed water lines, and geothermal circulation.
- Refining & Petrochemicals: Hydrocarbon fluid metering, catalyst slurry flow control, and gas transit networks.
Frequently Asked Questions (FAQ)
Why do we use Venturi Tubes for flow measurement?
Venturi tubes measure fluid flow rate based on the Venturi Effect. Their primary advantage is exceptionally low permanent pressure loss (recovering up to 90% DP), no moving parts, high durability, and non-intrusive flow measurement ideal for fluids with suspended solids.
What are the primary classical Venturi Tube types under ISO 5167?
ISO 5167 classifies three types: Type A (cast convergent section), Type B (machined convergent section for high accuracy), and Type C (rough-welded sheet-iron convergent section reinforced with stiffeners).
What custom materials are available for Venturi Tubes?
We supply Venturi tubes in Carbon Steel (A105N, A350 LF2), Stainless Steel (304L, 316L, 321), Duplex & Super Duplex (1.4462, UNS S32760), Alloy Steel (F5, F11, F22, F91), Monel, Hastelloy C276, Alloy 20, and Titanium.
Can strength calculations and third-party inspection be provided?
Yes. Every Venturi tube can be supplied with complete strength and bore calculations, optional calibration reports, and 3rd party inspection certificates from major classification bodies.
Global Supply Hubs & Regional Service Coverage
Gulf Oil & Gas International supplies standard and custom engineered Venturi Tubes directly to major project sites, refineries, and logistics hubs across Middle East, Africa, and CIS regions:
Middle East Territories
- United Arab Emirates (UAE): Dubai, Abu Dhabi, Sharjah, Ajman, Ras Al Khaimah, Fujairah, Al Ain.
- Saudi Arabia (KSA): Riyadh, Jeddah, Dhahran, Jubail, Yanbu.
- Qatar & Oman: Doha, Muscat.
- Kuwait & Bahrain: Kuwait City, Manama.
- Iraq & Levant: Baghdad, Basra, Mosul, Erbil, Sulaymaniyah, Amman, Beirut, Sanaa, Aden.
African Nations & Industrial Hubs
- North Africa: Algiers (Algeria), Cairo (Egypt), Rabat (Morocco), Tripoli, Benghazi, Misrata (Libya), Nouakchott (Mauritania), Tunis (Tunisia).
- West & Central Africa: Abuja, Lagos (Nigeria), Accra (Ghana), Abidjan (Ivory Coast), Dakar (Senegal), Luanda (Angola), Libreville (Gabon), Pointe-Noire (Congo), Malabo (Equatorial Guinea), N'Djamena (Chad).
- East & Southern Africa: Nairobi (Kenya), Dar es Salaam (Tanzania), Kampala (Uganda), Maputo (Mozambique), Lusaka (Zambia), Windhoek (Namibia), Khartoum (Sudan), Johannesburg, Cape Town, Durban (South Africa).
CIS Region Territories
- Central Asia: Almaty, Aktau (Kazakhstan), Ashgabat (Turkmenistan), Tashkent (Uzbekistan), Bishkek (Kyrgyzstan).
- Caucasus Region: Baku (Azerbaijan), Yerevan (Armenia), Tbilisi (Georgia).