RG Specification Master Table
Comprehensive technical parameters for our full range of Refrigerant Gas cylinders, detailing construction standards, steel grades, and operational pressure ratings.
| Model Series | Construction | Steel Used | Hydrostatic Test Pressure | Pneumatic Test Pressure | Max Working Pressure | Water Capacity |
|---|---|---|---|---|---|---|
| BTPS 5.6 Ltr | Two-Piece Welded | IS 6240 | 50 kgf/cm² | 12 kgf/cm² | 33.33 kgf/cm² | 5.6 Ltr (+5% / -0%) |
| BTPS 11.2 Ltr | Two-Piece Welded | IS 6240 | 50 kgf/cm² | 12 kgf/cm² | 33.33 kgf/cm² | 11.2 Ltr (+5% / -0%) |
| BTPS 25 Ltr | Three-Piece Welded | IS 6240 | 50 kgf/cm² | 12 kgf/cm² | 33.33 kgf/cm² | 25.0 Ltr (+3% / -0%) |
| BTPS 68 Ltr | Three-Piece Welded | IS 6240 | 45 kgf/cm² | 12 kgf/cm² | 27.88 kgf/cm² | 68.0 Ltr (+3% / -0%) |
| BTPS 13.6 Ltr HT | Two-Piece Welded | IS 15914 | 70 kgf/cm² | 12 kgf/cm² | 46.67 kgf/cm² | 13.6 Ltr (+0.65L / -0) |
| BTPS 55.4 Ltr HT | Three-Piece Welded | IS 15914 | 70 kgf/cm² | 12 kgf/cm² | 46.67 kgf/cm² | 55.4 Ltr (+3% / -0%) |
| BTPS 68 Ltr HT | Three-Piece Welded | IS 15914 | 70 kgf/cm² | 12 kgf/cm² | 46.67 kgf/cm² | 68.0 Ltr (+3% / -0%) |
Certified Gas Fill Weight Matrix (kg)
Maximum allowable fill weights calculated strictly per certified density filling ratios to ensure safe gas storage and transport.
| Gas Variant | BTPS 5.6L | BTPS 11.2L | BTPS 25L | BTPS 68L | BTPS 13.6L HT | BTPS 55.4L HT | BTPS 68L HT |
|---|---|---|---|---|---|---|---|
| R-410a | — | — | 17.00 kg | — | 11.05 kg | 45.04 kg | 55.28 kg |
| R-32 | — | — | — | — | 10.47 kg | 42.66 kg | 52.36 kg |
| R-404a | 3.80 kg | 7.62 kg | 17.00 kg | — | 9.25 kg | 37.67 kg | 46.24 kg |
| R-407c | 4.76 kg | 9.52 kg | 21.25 kg | 57.80 kg | 11.83 kg | 48.19 kg | 59.16 kg |
| R-22 | 5.04 kg | 10.00 kg | 22.50 kg | 61.20 kg | 12.24 kg | 49.86 kg | 61.20 kg |
| R-134a | 5.15 kg | 10.30 kg | 23.00 kg | 62.56 kg | 12.51 kg | 50.97 kg | 62.56 kg |
| R-152a | 5.15 kg | — | — | 62.58 kg | 10.50 kg | 42.76 kg | 52.50 kg |
| R-600a | — | 5.26 kg | — | 31.96 kg | 6.76 kg | 27.53 kg | 33.80 kg |
| R-290 (Propane) | — | — | — | — | 4.48 kg | 22.16 kg | 27.20 kg |
Two-Piece & Three-Piece Welded Structural Comparison
BTPS optimizes refrigerant vessel geometry according to volumetric capacity, selecting between two-piece deep drawn shells and three-piece rolled seam construction.
Two-Piece Deep Drawn Design
Engineered using two deep-drawn upper and lower cups joined by a single circumferential Submerged Arc Weld (SAW) seam. Eliminates longitudinal welds to enhance burst safety margins.
- Used in BTPS 5.6L, 11.2L Standard and 13.6L HT models
- Constructed from JSW IS 6240 or IS 15914 prime steel
- Minimizes total weld length for high pressure integrity
Three-Piece Rolled & Welded Design
Constructed with a central cylindrical body sheet welded longitudinally, combined with two hot-pressed convex dished ends. Optimized for high volumetric stability in commercial cooling storage.
- Used in BTPS 25L, 68L Standard and 55.4L, 68L HT models
- 100% radiographic grade longitudinal and circumferential SAW seams
- Ideal for commercial HVAC recovery and refilling plants
IS 15914 Micro-Alloyed Steel Sourcing
Modern A2L and A3 refrigerants like R-32 and R-290 exhibit significantly higher vapor pressures than older refrigerants. Standard IS 6240 steel cannot safely support these operating pressures without excessive wall thickness.
BTPS solves this challenge by procuring micro-alloyed IS 15914 steel exclusively from JSW Steel, delivering elevated yield strength and fatigue resistance while maintaining optimal cylinder tare weight.
Micro-Alloyed Steel Performance
- Hydrostatic Proof Rating: $70 \text{ kgf/cm}^2$ proof test vs $45\text{–}50 \text{ kgf/cm}^2$ standard.
- Maximum Working Allowance: $46.67 \text{ kgf/cm}^2$ allowed working pressure.
- Fatigue Endurance: Superior cyclic pressure resistance under ambient thermal expansion.
- Weight Optimization: Micro-alloying increases yield strength without adding unneeded tare weight.
100% Hydro-Stretch & Pneumatic Testing Rig
Every refrigerant gas cylinder produced at our Belagavi facility undergoes mandatory individual water-jacket volumetric expansion and pneumatic leak testing under BIS supervision.
Tested to 45, 50, or 70 kgf/cm² depending on the series. Permanent volumetric expansion must not exceed statutory limits.
Submerged in water testing tanks under 12 kgf/cm² air pressure to verify zero seam or valve thread porosity.
X-ray inspection performed on longitudinal and circumferential SAW weld seams to detect internal inclusions.
Bureau of Indian Standards officers inspect test logs and issue certified batch clearance before dispatch.
Custom OEM Surface Treatments & Color Coding
BTPS configures High-Test and Standard RG cylinders for global HVAC OEMs and gas distributors with custom branding and surface protection.
Polyurethane topcoats in standardized refrigerant colors (e.g., Rose for R-410a, Light Blue for R-134a) or custom corporate RAL shades.
Automated grit blasting followed by 40-micron arc-sprayed pure zinc metallizing for marine or highly corrosive tropical environments.
Durable, solvent-resistant screen printing of customer logos, gas chemical formulas, tare weight callouts, and safety precautions.
Integrated IS 3224 certified brass valves with specific outlet threads and integrated steel valve protection guards.
High-Test Engineering & Steel Security
Pressure-class engineering specifically developed for modern eco-friendly cooling gases.
IS 15914 High-Test Steel Strength
JSW prime steel compliant with IS 15914 supports the HT series pressure class: 70 kgf/cm² hydrostatic testing and 46.67 kgf/cm² maximum working pressure for approved high-pressure refrigerant applications.
Valve Safety & 100% Leakage Testing
Each cylinder is fitted with an IS 3224 compliant valve and valve guard. Every unit undergoes 100% hydraulic expansion testing and 100% pneumatic bubble leakage testing at 12 kgf/cm², with final inspection records reviewed under BIS requirements.
Refrigerant Gas Cylinder Technical & Safety Guidelines
Factual engineering guidelines regarding steel selection, test pressure ratings, and fill capacities for refrigerant cylinder procurement.
Which steel grades are used for Standard vs High Test (HT) Refrigerant cylinders?
Which steel grades are used for Standard vs High Test (HT) Refrigerant cylinders?
Standard RG cylinders (5.6L to 68L) are constructed using JSW prime steel compliant with IS 6240 for working pressures up to 33.33 kgf/cm². High Test (HT) series cylinders (13.6L, 55.4L, 68L) utilize micro-alloyed JSW steel under IS 15914 to safely support 70 kgf/cm² hydrostatic test pressure and 46.67 kgf/cm² maximum working pressure.
Which refrigerants require High Test (HT) series cylinders?
Which refrigerants require High Test (HT) series cylinders?
High-pressure, eco-efficient refrigerants such as R-410a, R-32, and R-290 (propane) require BTPS HT series cylinders (13.6L, 55.4L, 68L) due to their elevated operating vapor pressures requiring a 70 kgf/cm² hydrostatic test rating.
What pressure testing protocols do BTPS High Test cylinders undergo?
What pressure testing protocols do BTPS High Test cylinders undergo?
Every single RG cylinder unit undergoes 100% hydraulic expansion testing (at 45, 50, or 70 kgf/cm² depending on the model) and 100% pneumatic bubble leakage testing at 12 kgf/cm² before receiving final BIS inspecting officer clearance.