BIS Certification for Horizontal Centrifugal Pumps (General Purpose) in India: Complete Compliance Guide

Horizontal Centrifugal Pumps for General Purposes are subject to mandatory BIS ISI certification under the Pumps (Quality Control) Order, 2026. From 6 mo after publication of the QCO in the e-Gazette, these products cannot be lawfully manufactured for sale, imported, or distributed in India without a valid BIS ISI licence under IS 6595 (Part 2):1993. Non-compliance attracts penalties under the BIS Act, 2016 — product seizure, fines, and prosecution.

This guide covers the applicable Indian Standard, key technical and safety requirements, the step-by-step certification process, documentary requirements, and the most common compliance pitfalls for manufacturers and importers.

📜 Applicable Indian Standard

• IS 6595 (Part 2):1993 — Horizontal Centrifugal Pumps for General Purposes (primary standard)
• Aligned with the corresponding IEC / ISO standard for technical performance and safety
• Latest amendments notified by BIS apply automatically

🔬 Key Quality Requirements Under IS 6595 (Part 2):1993

BIS-approved laboratories evaluate the following during type testing:

Products covered under IS 6595 (Part 2):1993:

• HVAC chilled-water pumps for commercial cooling circuits
• Industrial process pumps for clean-water transfer
• Building water boosting pumps for high-rises
• Fire-pump boost stages (within general-purpose construction)

📋 Step-by-Step BIS ISI Certification Process

1. Scope SelectionConfirm the pump is marketed for non-agricultural general purposes. Mixed-use products may require dual scoping under both Parts.
2. Application FilingSubmit online application on manak.bis.gov.in. Indian manufacturers via Product Certification Scheme; foreign manufacturers via FMCS.
3. Sample TestingSubmit complete pump assemblies to a BIS-recognised pump testing laboratory. Hydraulic, endurance, and seal tests: approximately 4–6 weeks.
4. Factory InspectionBIS officers inspect casting, machining, and assembly process plus in-house testing capability.
5. Licence GrantBIS issues the ISI Mark licence. ISI Mark plus licence number is applied on the pump nameplate.
6. Surveillance & RenewalPeriodic BIS market sample testing, factory audits, and annual marking fees keep the licence active.

📄 Documents Required

• Company incorporation / registration certificate
• Product list with kW rating, head, discharge, and service category
• Pump engineering drawings and BOM
• Process flow chart for casting, machining, and assembly
• In-house testing capability details
• Quality Manual / ISO 9001 certificate (if available)
• AIR appointment letter (for foreign manufacturers)
• Existing test reports from BIS-recognised labs (if any)

⚠ Common Compliance Pitfalls

Common issues include hydraulic shortfall at rated head, mechanical-seal leakage under endurance testing, casting defects under hydrostatic test, and incomplete service-category markings.

🏭 Special Considerations for Importers

Imported general-purpose pumps targeting Indian HVAC, building-services, and industrial markets must hold valid BIS ISI certification. EPC contractors and MEP integrators increasingly require ISI documentation as a vendor onboarding criterion.