Answer:
The barrier is certified by ARAI to ASTM 2626-18 MP30-P1 (K4 rating), stopping a 7200 kg vehicle moving at 48 to 50 km/h within 1 meter (750 mm) penetration. It is built from S235/RAEX250 galvanised structural steel with AISI 303 hinges, bronze bearings, and a 15-year corrosion-resistant finish adhering to BS 5493.
The Neptune NCRB K4-6 barrier is designed to mitigate vehicle-borne ram attacks at critical infrastructure installations. The barrier has undergone physical impact testing and holds official performance certifications:
- ARAI Crash Certification: Certified by the Automotive Research Association of India (ARAI) under ASTM 2626-18 MP30-P1 (equivalent to US Department of State K4 rating). The barrier is certified to stop a 7200 kg (6.8 to 7.2 ton) commercial truck traveling at 48 to 50 km/h (30 mph) with a maximum dynamic penetration distance under 1000 mm (tested at 750 mm).
- International Equivalencies: ARAI has certified the barrier to be equivalent to ISO IWA 14-2:2013 standard rating D/7200 [N2B]/48/90.0.0 and BSI PAS 68:2013 rating D/7200/48/90/640.
- Structural Metallurgy: Heavy-duty chassis fabricated from S235, RAEX250 (Quality 37 minimum), or FE 360 galvanised steel. Moving mechanical parts and hydraulic cylinder joints utilize heavy-duty hardened steel or AISI 303 grade stainless steel hinges with bronze bearings.
- Corrosion Protection: Multi-stage surface treatment including shot blasting, hot zinc spraying (galvanising), priming, and a final polyurethane topcoat in gray. This process provides a 15-year corrosion protection barrier for polluted industrial inland environments per BS 5493:1977 (revised 1984).
