V1 Calibration Block

IIW/V-1 (Dutch) Standard Test Block Overview

A reference ultrasonic testing block jointly recommended by the International Institute of Welding (IIW) and ISO, commonly known as the Dutch Test Block. Key applications include equipment calibration and performance verification:

✅ Dynamic range/horizontal linearity verification (25mm thickness section)

✅ Refraction angle measurement & blind zone estimation (P50 arc + φ1.5 through-hole)

✅ Incident point calibration & time-axis adjustment (R100mm arc surface)

✅ Longitudinal resolution testing (85/91/100mm stepped notches)

✅ Beam deflection angle measurement (right-angle edge)

Product Portfolio & Industry Applications

▶ Test Block Types

Ultrasonic calibration (SC sensitivity block, phased array block)

Specialized blocks for eddy current, magnetic particle, and penetrant testing

▶ Key Industries

Aerospace, nuclear power, high-speed rail, pressure vessels, petrochemicals, shipbuilding, welded steel structures

Standardization & Technical Contributions

Actively involved in drafting/revision of 20+ national testing standards since the 1980s, including:

GB/T 11345-2013 (Ultrasonic Testing of Welds): Spearheaded test block design and validation

NB/T 47013 (JB/T 4730) (Pressure Equipment NDT): Provided experimental data and test block support

Global Collaboration & Market Reach

▶ Technical partnerships: Collaborations with experts from Germany, UK, Russia, India, Japan, South Korea, etc.

▶ Export networks: Serving markets in North America, Europe, Russia/India, and East Asia

Competitive Advantages

Leveraging decades of standardization expertise and cross-industry data to deliver ISO/IIW-compliant test blocks for versatile non-destructive testing (NDT) applications.