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Above Ground Fire Hydrant — Standard, Anti-Impact & Large-Flow Series | CA-FIRE
✓ GB Standard (国标)✓ DN100 / DN150✓ 1.6 MPa Working Pressure✓ Standard · Anti-Impact · Large-Flow✓ Auto-Drain · Self-Sealing✓ Water · Foam Compatible✓ ISO 9001 · GB · CE
The CA-FIRE above ground fire hydrant series covers the full range of GB-standard outdoor pillar hydrants for municipal water networks, industrial plant perimeters, logistics parks and commercial developments across China and international markets specifying the Chinese national standard. The series is available in three structural variants — Standard (SS-H sloped-shoulder), Anti-Impact (SS-D rounded-shoulder with breakaway collar), and Large-Flow (SS-A / SS150) — in DN100 and DN150 inlet sizes at 1.6 MPa working pressure. All models feature a built-in auto-drain system that expels residual water after each use, a self-sealing valve mechanism that prevents water hammer, and dual outlets (M125×6 + 2-KWS65 for DN100; M170×6 + 2-KWS80 for DN150) compatible with Chinese standard fire hose couplings. All models carry GB certification and ISO 9001, and are compatible with both water and foam concentrate supply systems.
Three Variants — Select by Installation Environment
All three variants share the same hydraulic core, certification and outlet configuration. The difference is in the upper body structure — select based on vehicle traffic risk and water pressure conditions at the installation site.
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Standard Type — SS-H 斜肩型 · Sloped Shoulder The standard GB above-ground hydrant for municipal roads, residential estates and commercial developments. The sloped-shoulder upper body is the classic GB pillar hydrant profile — widely recognised by Chinese fire brigades, property managers and municipal inspectors. Suitable for installations on footpaths, green belt edges and road verges where vehicle collision risk is low. The SS-H profile is the most widely installed above-ground hydrant type in China.
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Anti-Impact Type — SS-D 圆肩防撞型 · Rounded Shoulder with Breakaway Designed for locations with significant vehicle traffic risk — industrial plant roads, logistics park internal roads, petrochemical facility perimeters, car parks and any installation where a vehicle could contact the hydrant body. The rounded-shoulder profile and breakaway collar mechanism allow the upper body to detach cleanly on vehicle impact without damaging the underground valve or the water main connection. After an impact event the valve remains closed and watertight — the hydrant can be returned to service simply by replacing the upper body section, with no excavation or mainline repair required.
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Large-Flow Type — SS-A 尖头型大流量 · Pointed Top / High-Flow The SS-A (pointed-top / 尖头型) variant is optimised for high-flow applications where the system is designed to deliver large-volume water supply at speed. The internal flow path geometry maximises Kv and minimises pressure drop across the valve at full opening, providing higher delivered flow rate at the same supply pressure compared to the standard SS-H type. Available in DN100 and DN150 inlet sizes; the DN150 SS150/80-1.6A variant provides the highest flow capacity in the series. Suitable for large industrial sites, warehousing complexes and any location where fire engineering calculations demand above-standard flow delivery.
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Technical Specifications — Full Model Range
| Series | Model | Rated Pressure | Inlet Type | Inlet DN | Water Outlet | Hose Coupling | Opening Height |
|---|---|---|---|---|---|---|---|
| Standard SS-H 斜肩型 |
SS100/65-1.6H | 1.6 MPa | Flange | DN100 | M125×6 | 2-KWS65 | ≥50 |
| SS150/80-1.6 | DN150 | M170×6 | 2-KWS80 | ≥55 | |||
| Large-Flow SS-A 尖头型 |
SS100/65-1.6A | 1.6 MPa | Flange | DN100 | M125×6 | 2-KWS65 | ≥50 |
| SS100/65-1.6A (DN150 inlet) |
DN150 | M170×6 | 2-KWS65 | ≥55 | |||
| SS150/80-1.6A | DN150 | M170×6 | 2-KWS80 | ≥55 | |||
| Anti-Impact SS-D 圆肩防撞型 |
SS100/65-1.6D | 1.6 MPa | Flange | DN100 | M125×6 | 2-KWS65 | ≥50 |
| SS150/65-1.6D | DN150 | M170×6 | 2-KWS65 | ≥55 | |||
| SS150/80-1.6D | DN150 | M170×6 | 2-KWS80 | ≥55 |
Common Parameters — All Models
| Parameter | Specification |
|---|---|
| Compliance Standard | GB 4452 (室外消火栓) · ISO 9001:2015 · CE |
| Rated Working Pressure | 1.6 MPa |
| Test Pressure (Hydrostatic) | 2.4 MPa — 30-minute hold, zero leakage |
| Inlet Connection | Flange — GB standard flange dimensions |
| DN100 Outlet | Water takeoff: M125×6 · Hose coupling: 2-KWS65 (65 mm Chinese standard) |
| DN150 Outlet | Water takeoff: M170×6 · Hose coupling: 2-KWS80 (80 mm Chinese standard) |
| Body Material | Ductile iron |
| Surface Treatment | Electrostatic powder coating — RAL 3000 red standard · Black lower barrel |
| Auto-Drain | Built-in auto-drain — expels residual water after each use · prevents barrel freeze |
| Foam Compatibility | Compatible with water and foam concentrate mixed supply · customisable per user requirement |
| Extended-Height Option | SS100/65-1.6H (1.3 m) available for installations requiring above-standard barrel height (e.g. deep snow regions, raised kerb installations) |
| Encrypted / Dense-Pitch Option | All models available in encrypted (加密型) variant with denser thread pitch for high-security installations |
| Warranty | 2 years |
* All models can be manufactured as underground below-ground variants — contact CA-FIRE engineering for project-specific configurations.
Key Technical Features
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💥 Anti-Impact Breakaway Collar — SS-D Series The SS-D anti-impact hydrant uses a designed-fracture breakaway collar at the base of the upper body. On vehicle impact, the collar fractures at a pre-determined load — allowing the upper barrel to separate cleanly from the lower valve body. The main valve remains in the closed position throughout the impact event. This design prevents the most costly outcome of hydrant vehicle impact: a sheared-off lower body that opens the water main and causes flooding before the supply can be isolated. After a SS-D impact event, no water is lost, no excavation is required, and the hydrant returns to service after upper-body replacement only. Breakaway Collar · Valve Stays Closed · Upper Body Replacement Only |
🌊 Built-In Auto-Drain — All Models All models in the SS series incorporate an automatic drain valve at the base of the barrel. When the main valve closes after use, the drain port opens mechanically and gravity-drains all residual water from the barrel above the valve seat — leaving the barrel dry within 3–5 minutes without any manual intervention. This passive system prevents barrel freeze in sub-zero conditions, eliminates standing water that promotes internal corrosion, and ensures the hydrant is immediately ready for the next deployment without requiring a maintenance drain procedure after each use. The drain valve is field-replaceable without removing the hydrant from service. Auto-Drain · All Models · Field-Replaceable Drain Valve |
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🔥 Foam & Water Compatible — All Models All SS series above-ground hydrants are compatible with water and foam concentrate mixed supply. When connected to a foam bladder tank proportioning system or a foam pump supply main, the hydrant delivers pre-mixed foam solution directly to the hose outlet without requiring a separate foam hydrant. Internal materials (EPDM seals, ductile iron body, brass valve core) are tested for chemical compatibility with 3% and 6% AFFF and AR-AFFF foam concentrates. This dual compatibility makes the SS series the standard choice for mixed-use industrial sites where both water-only and foam suppression zones are present — a single hydrant type covers both system types, simplifying procurement and spare parts management. Water + AFFF / AR-AFFF Compatible · 3% & 6% Ratio |
📐 Extended Height & Encrypted Options The extended-height variant (SS100/65-1.6H at 1.3 m barrel height) is available for installations requiring a taller hydrant profile — deep snow regions in northern China, installations adjacent to raised kerbs or loading bays, or projects where the design authority requires a minimum outlet height above finished ground level exceeding the standard model’s dimension. The encrypted (加密型) variant incorporates denser thread pitch on the outlet ports and a security cap system, for high-security sites (military, government, data centres) where preventing unauthorised access to the hydrant outlet is required. All customisation options confirmed at the time of enquiry. 1.3 m Extended Height · Encrypted Thread · Customisable |
Model Selection Guide
| Your Requirement | Recommended Model | Reason |
|---|---|---|
| Municipal road / residential estate / commercial development, low vehicle risk | SS100/65-1.6H | Standard profile — most widely used, lowest cost, meets all GB 4452 requirements for general installations |
| Industrial plant internal roads, logistics parks, car parks, petrochemical sites with vehicle traffic | SS100/65-1.6D or SS150/65-1.6D | Anti-impact breakaway collar prevents water main damage on vehicle collision. DN100 for standard flow; DN150 if fire engineering calculation requires higher flow |
| Large warehouse, high-rack storage facility, large industrial site with high fire load — maximum flow required | SS150/80-1.6A | DN150 large-flow variant delivers highest flow rate in the series — for fire engineering calculations that require above-standard hydrant flow |
| Northern China, high-altitude, or cold region where deep snow may obscure standard-height hydrant | SS100/65-1.6H (1.3 m) | Extended barrel height (1.3 m) keeps outlet ports above expected maximum snow depth. Auto-drain prevents barrel freeze regardless of height variant |
| Industrial site with foam suppression system — hydrant must deliver pre-mixed foam solution | Any SS model (foam-compatible as standard) | All SS models are foam-compatible. Select the structural variant (H/D/A) based on vehicle risk and flow requirement, then confirm foam system type at enquiry |
| High-security site — unauthorised access to hydrant outlet must be prevented | Any SS model — encrypted (加密型) variant | Encrypted outlet thread and security cap system prevents connection of standard fire hose without the dedicated key — available on all models on request |
Installation Guide
Site Requirements
Per GB 50974 (Code for Design of Fire Water Supply and Fire Extinguishing Systems) and GB 4452 (Outdoor Fire Hydrant standard): above-ground hydrants on municipal roads should be positioned at a maximum spacing of 120 m along each side of the road in urban areas; each hydrant should be within 150 m hose lay of any building face it protects; minimum 1.0 m clearance from the kerb face for road-edge installations; minimum 0.5 m from any wall or obstruction. Hydrant centreline should be set at finished ground level with the lower flange set on a concrete plinth rated for the full hydrant operating load.
Installation Steps
Excavate to water main connection depth. Prepare reinforced concrete plinth (minimum 400 × 400 × 200 mm) at finished ground level, with hold-down bolt holes aligned to the hydrant flange bolt circle. Set the hydrant on the plinth, check verticality (≤ 3 mm/m), and fit the GB flange gasket between hydrant inlet flange and water main tee or branch. Insert and tighten flange bolts in a cross-pattern to the specified torque. Backfill and compact around the barrel in 150 mm lifts to prevent settlement. Do not compact directly against the barrel. Conduct the commissioning hydrostatic test at 2.4 MPa for 30 minutes with zero leakage. Install hydrant sign marker per GB 4452 and local fire authority requirements.
Anti-Impact (SS-D) Additional Requirement
For SS-D models, the breakaway collar must be correctly assembled to the specified torque value — over-tightening the collar fasteners will prevent the designed fracture from occurring at the correct impact load, defeating the anti-impact function. Do not weld, epoxy or modify the collar assembly. After any impact event: close the supply isolation valve upstream; remove the broken upper body; inspect the lower body and valve for damage; replace the upper body with a factory-supplied replacement section; re-torque the collar assembly to specification; recommission with a pressure test before returning to service.
Maintenance Schedule
| Frequency | Task |
|---|---|
| Monthly | Visual inspection of body, outlet caps and surface coating. Confirm outlet caps are secure. Verify auto-drain is functional (open briefly with no hose and confirm drainage within 5 minutes of closure). Clear the 1.0 m access zone. Check GB marking plate and fire hydrant sign are in place and legible. For SS-D models: inspect the breakaway collar for any pre-existing cracks, deformation or improper repair from a previous unreported impact event. |
| Quarterly | Remove outlet caps and inspect KWS coupling seals for wear or deformation. Apply grease to the operating spindle. Check the drain valve port for sediment blockage — clear if required. Re-torque flange bolts if any loosening detected. Lubricate the valve operating square. |
| Annual | Full hydrostatic test (2.4 MPa, 30 minutes) per GB 4452 inspection requirements. Flow test and record at a representative system pressure. Inspect internal valve seat for wear; replace valve disc if closing torque has increased significantly. Repaint areas of coating failure. Update the fire protection system maintenance log as required by the building’s fire protection inspection authority. For foam-connected systems: inspect internal wetted surfaces for foam concentrate residue and flush clean. |
Applications
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Municipal Roads & Residential Estates Urban and suburban road networks, residential community perimeters, commercial street frontages. SS100/65-1.6H is the default specification for these applications under GB 50974 — the standard GB-marked red pillar hydrant that Chinese fire brigades and property management teams are trained to operate. → Specify: SS100/65-1.6H |
Industrial Parks & Logistics Factory compounds, logistics parks, container terminals and distribution centres where forklift trucks, HGVs and delivery vehicles operate in the vicinity of hydrant locations. The SS-D anti-impact variant is the correct specification wherever vehicle collision is a realistic risk. → Specify: SS100/65-1.6D or SS150/65-1.6D |
Petrochemical & Chemical Plants Refinery perimeters, chemical processing units, LPG storage areas and tank farm bunds. Anti-impact variant protects against process vehicle collision; foam compatibility allows the hydrant to serve both water cooling and foam application duties from the same connection point. → Specify: SS100/65-1.6D (foam-compatible) |
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Large Warehouses & High-Rack Storage High-rack automated storage facilities, cold chain logistics centres, e-commerce fulfilment warehouses and other large-footprint storage buildings with high fire loads. Fire engineering calculations for these occupancies typically require above-standard hydrant flow rates — specify the DN150 large-flow SS-A variant to satisfy the hydraulic design. → Specify: SS150/80-1.6A |
Export — GB Standard Markets Infrastructure projects in Southeast Asia, Central Asia, Africa and other markets where Chinese contractors, Chinese-financed infrastructure projects, or Belt-and-Road (BRI) construction specify GB standard fire protection equipment. CA-FIRE supplies the full SS series to BRI project contractors across over 30 countries. → Specify: Per project engineer’s GB standard requirement |
Northern China — Cold Regions Heilongjiang, Inner Mongolia, Xinjiang, Qinghai and other provinces with sustained sub-zero winters. The built-in auto-drain prevents barrel freeze on all SS models as standard. The 1.3 m extended-height variant keeps outlet ports accessible when snow accumulation depth may obscure a standard-height hydrant. → Specify: SS100/65-1.6H (1.3 m) with auto-drain confirmed |
Frequently Asked Questions
Applicable Standards
| Standard | Scope |
|---|---|
| GB 4452 | 室外消火栓 — Outdoor Fire Hydrants. Primary product standard governing performance, dimensions, materials, testing and marking for all GB-standard outdoor fire hydrants including this series. Published by the Standardization Administration of China (SAC). |
| NFPA 24 | Standard for the Installation of Private Fire Service Mains. Referenced on international projects involving Chinese contractors where the project engineer uses NFPA standards alongside or instead of GB. Governs hydrant spacing, flow testing and isolation valve requirements for private water mains. |
| GB 50974 | 消防给水及消火栓系统技术规范 — Technical Code for Fire Water Supply and Fire Hydrant Systems. Governs system design including hydrant spacing, flow requirements, pipe sizing and installation for all GB standard projects in China. |
| ISO 9001:2015 | CA-FIRE quality management system certification. Covers design, manufacturing, testing and supply chain management for all fire hydrant products in this series. |
Related Products
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Get a Quote — Above-Ground Fire Hydrant
GB Standard · DN100 / DN150 · 1.6 MPa · Standard / Anti-Impact / Large-Flow
Auto-Drain · Foam Compatible · Extended Height · Encrypted Options · Factory Direct
sales@ca-fire.com
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