Oleo Tecnica Butt-Weld Counter Flanges for Metric Pipe

Description

Oleo Tecnica Butt-Weld Counter Flanges for Metric Pipe represent an extremely reliable connection solution for industrial hydraulic systems. Designed to ensure leak-tight sealing and a structurally robust connection, these counter flanges integrate seamlessly into hydraulic circuits, providing a deep and durable butt weld. The construction design features a 30-degree welding bevel, specifically engineered to facilitate precise and resistant coupling with metric pipe sections.

Pressure Specifications and Series

The performance and overall dimensions of the counter flanges are structured into two primary variants to accommodate different hydraulic loads. Series 3000 covers a broad dimensional range, starting from 1/2″ up to 5″. Within this series, the maximum recommended working pressure is 345 Kg/cm² for the more compact sizes (from 1/2″ to 1″), then progressively decreases to 276 Kg/cm² (1″1/4), 207 Kg/cm² (from 1″1/2 to 2″) and reaches 34 Kg/cm² for the larger sizes (4″ and 5″). For circuits requiring higher pressure containment, Series 6000 – supplied in the 1″1/2 size – provides a maximum working pressure of up to 414 Kg/cm². It should be noted that the maximum recommended working pressure is based on the structural limits of the flange itself; the maximum working pressure of the complete system is always determined by the wall thickness and material type of the pipe actually used.

Construction Features and Materials

Oleo Tecnica Butt-Weld Counter Flanges for Metric Pipe are manufactured in two main metallurgical options, selectable according to the conveyed fluid and the severity of the operating environment. The standard S355 designation (identified by the GFS prefixes) indicates the use of high-strength structural steel, suitable for most civil and industrial hydraulic applications. For operating conditions with a high risk of corrosion, the counter flanges are available in AISI 316L stainless steel (identified by the GFX prefixes). Component weights increase with nominal diameter, ranging from a minimum of 0.25 kg for 1/2″ units (Series 3000) up to 4.00 kg for the 5″ version.

Geometry and Dimensional Tolerances

The geometric precision of the counter flanges is essential to ensure perfect alignment with the metric pipe during welding. Dimensional parameters vary according to nominal size to ensure correct stress distribution. For example, the overall thickness and flange dimensions increase proportionally: the centre-distance dimension ranges from 38.10 mm for 1/2″ models up to 152.40 mm for heavy-duty 5″ sizes. The distance between hole centres is precisely calibrated to match dimensional standards, ensuring safe interchangeability and even distribution of screw clamping loads while preventing distortion.

Fastening and Hole Options

To simplify assembly, the counter flanges can be ordered with different hole standards while maintaining the same primary geometric profiles. The units feature metric threaded fastening holes (identified by the SRE/STRE designations), supporting screws from M8 up to M16 depending on the counter flange diameter. Alternatively, to suit international machinery and systems or specific project requirements, they are available with UNC threaded fastening holes (SREU/STREU designations), sized for screws from 5/16″ up to 5/8″.

Summary technical table of the main characteristics of Oleo Tecnica Butt-Weld Counter Flanges for Metric Pipe

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