G-32-F – Unsupported Boom-Type Bottom Loader
The G-32-F is OPW G32F API Bottom Loading Arm — a heavy-duty, unsupported boom-type loader with a minimum of five swivel planes for complete flexibility when loading or unloading railcars, tank trucks, and aviation refuelers. It stores compactly at or near ground level and meets the API RP-1004 working envelope.
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G-32-F – Unsupported Boom-Type Bottom Loader
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G-32-F – Unsupported Boom-Type Bottom Loader
Overview
The OPW G32F API Bottom Loading Arm unsupported boom-type bottom loader is designed for flexible, long range operation in demanding terminal environments. A minimum of five swivel planes of rotation lets operators make tight connections at the side, rear, or underside of a vehicle. The outboard swivel and arm self-adjust for changes in elevation or tilt as the vehicle fills or empties.
Arms are typically installed at or near ground level and can be mounted on staggered risers to achieve crossover and neat, compact “scissor back” storage of multiple arms in a confined space. The G-32-F is torsion spring balanced for smooth one hand operation and is pre balanced at the factory to minimize installation and commissioning time.
Key Features
- Minimum five swivel planes of rotation for complete connection flexibility
- Outboard two plane swivel joint adjusts for vehicle elevation/tilt
- Torsion-spring balanced for smooth, low effort handling
- Compact scissor back storage; mount on staggered risers for crossover
- Meets the API RP-1004 bottom loading working envelope
- Choice of flanged, threaded, or all welded construction
- Available in carbon steel, stainless steel, aluminum, and specialty alloys
- LPG service variant available (LPG-32-F, all welded construction)
G-32-F Specifications
| Specification | Detail |
|---|---|
| Type | Unsupported boom-type bottom loading arm |
| Line sizes | 2″ / DN50, 3″ / DN80, 4″ / DN100, 6″ / DN150 |
| Max flow rate | 600 GPM (135 m³/h) |
| Max design pressure | 125 psi (8.6 bar) |
| Max allowable working pressure | 75 psi (5 bar) |
| Swivel planes | Minimum 5 |
| Balancing | Torsion-spring balanced (pre-balanced at factory) |
| Construction | Flanged, threaded, or all-welded |
| Connection options | API coupler, dry-disconnect coupler, threaded, or flanged end fitting |
| Compliance / envelope | API RP-1004 bottom-loading working envelope |
| Storage | Compact scissor-back; staggered-riser crossover |
Source: OPW Loading Arm Systems catalog
Materials of construction
| Component | Material |
|---|---|
| Inlet swivel | Carbon steel |
| Intermediate swivel | Ductile iron |
| End swivel assembly | Aluminum |
| Swivel seals | Viton® GFLT |
| Boom arm | Carbon steel |
| Primary arm | Aluminum |
Source: OPW G32F/G33F data sheet
G-32-F Frequently Asked Questions
The G-32-F is an unsupported boom type API bottom loading arm used to load and unload railcars, tank trucks, and aviation refuelers at petroleum, fuel, and chemical terminals. Its five plus swivel planes allow tight side, rear, or underside connections.
The G-32-F is available in 2″, 3″, 4″, and 6″ line sizes (DN50–DN150), with a maximum flow rate of 600 GPM (135 m³/h).
The G-32-F has a maximum design pressure of 125 psi (8.6 bar) and a maximum allowable working pressure of 75 psi (5 bar).
It’s offered in carbon steel, stainless steel, aluminum, and specialty alloys, with a choice of flanged, threaded, or all welded construction.
Yes. The G-32-F is designed to cover the API RP-1004 bottom loading working envelope and is used by major oil terminals worldwide.
SafeRack’s Regional Area Managers help you spec the right configuration, size, and end fitting for your application. Request a quote and an expert will follow up.
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