The 270° Fillet Weld Vacuum Box is a specially designed vacuum box for leak testing along external welds with a 270° extension. It has a roof-like shape and rounded edges to accommodate welds such as “outer 90° edges” and enables testing in areas where a regular 90° box does not provide full coverage.

Key features and benefits

• Roof/sheet-like construction with rounded edges to reach surrounding weld zones.

• Realistic test design for external weld joints that include the “outer 90° edge”.

• Standard length approx. 500 mm, making it practical for industrial use.

• Complemented by MR Chemie's VSP leak test equipment and suitable hoses, sealing strips and inspection glasses.

• Suitable for use with leak testing methods such as bubble testing, using moist test water/inspection spray and vacuum under box to reveal leaks.

Technical information

• Box test surface: approx. 500 mm length.

• Seal: soft rubber strip that forms around the welding area and ensures an airtight seal.

• Inspection window: transparent and robust material, allowing bubbles and leak indications to be clearly observed.

• Valve/Connection: Box can be connected to vacuum hose with standard conical adapter, and vacuum is carried over time to observe any leaks.

• Operating temperature and environment: adapted for industrial environments, available in different sizes and “miniature” version for vessels with limited height.

Areas of application

• Testing weld joints with external 270° geometry, such as in corners and around structural corners.

• Inspection of tanks, vessels or containers where the weld covers more than just one surface.

• Maintenance and control of leak tightness in welds exposed to liquids or hazardous substances.

• Fulfillment of regulatory requirements that require documented leak testing for welded joints in particularly exposed zones.