Objectives

The primary objective is to procure and install a single 2000-litre vertical storage water heater/calorifier for operational use at the client’s facilities. The tender seeks a qualified supplier capable of delivering a fully compliant, high-performance unit while adhering to South African public procurement legislation, quality assurance standards, and socio-economic preferential scoring frameworks.

Scope

The scope covers the complete supply, delivery, and installation of the specified calorifier. It mandates attendance at a compulsory site briefing, strict compliance with on-site safety protocols, and comprehensive documentation submission. All bids must be submitted exclusively through the official procurement portal. Evaluation utilises an 80/20 weighted scoring model, allocating 80% to price competitiveness and 20% to verified socio-economic transformation goals. The awarded supplier will operate under the General Conditions of Contract (July 2010).

Technical Requirements

• Capacity & Configuration: 2000 Litres, Vertical Storage
• Materials & Thickness: 6mm mild steel ends, 4.5mm mild steel shell
• Pressure Ratings: 400 kPa working pressure, 600 kPa test pressure
• Design Code: Compliant with ASME VIII Division 1
• Dimensions & Weight: 1400mm diameter (+150mm insulation allowance), 1480mm height (+150mm connection allowance), 378kg
• Construction: All seams fully welded internally and externally
• Connections: Heavy-duty sockets for inlet, outlet, return, temperature/pressure, and thermostat
• Internal Finish: Blast-cleaned to ISO8501 SA3 standard, coated with Stoncor Phenoline Tank Shield (minimum 5-year warranty) or equivalent
• External Finish: Two coats of grey primer
• Manhole: 380mm elliptical with insulated cover
• Heating & Controls: Dual 12kW electric elements, 24kW single-step control panel with door lock and isolator
• Safety & Efficiency Components: 20mm safety valve, Royles indented tubes (rated for 192kW @ 420kPa), 25mm thermostatic valve, 1500mm aluminium sacrificial anode, integrated temperature/pressure gauges
• Lagging/Insulation: 75mm glass wool with 0.6mm galvanised cladding, achieving an R-value of 2.08 per SANS standards

Skills and Compliance Requirements

• Attend the compulsory site briefing and wear appropriate personal protective equipment (PPE) when accessing premises
• Submit a valid Certificate of Analysis (COA) issued by the original manufacturer
• Provide a minimum of two stamped reference letters confirming successful supply of identical or similar goods within the preceding 24 months
• Hold a valid Construction Industry Development Board (CIDB) contractor registration with a minimum grading of ME01
• Complete and submit all statutory declaration forms regarding state employment, conflict of interest, anti-collusion practices, and preference point claims
• Failure to include any compulsory document results in immediate disqualification

Explanation of Unusual or Complicated Terms

• CIDB ME01: A South African contractor grading category designated for emerging enterprises undertaking mechanical/electrical construction works within a specific financial threshold.
• ASME VIII Div.1: A globally recognised engineering code that governs the design, fabrication, and inspection of pressurised vessels to guarantee structural integrity and operational safety.
• ISO8501 SA3: A surface preparation standard requiring near-white metal blast cleaning of steel prior to coating, ensuring maximum paint adhesion and long-term corrosion resistance.
• 80/20 Preference System: A South African public procurement scoring mechanism where 80 points are awarded for competitive pricing and 20 points for socio-economic goals, including black ownership (≥51%), women ownership (≥30%), and disability inclusion.