Seismic bracing for fire pipes
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- Product material: Mainly made of Q235B steel or 304 stainless steel, with tensile strength ≥375MPa and yield strength ≥235MPa, ensuring the strength and stability of the bracket.
- Surface treatment: Available in hot-dip galvanizing (zinc layer ≥65μm), natural stainless steel, epoxy spraying (dry film ≥80μm) and other methods, with good corrosion resistance, salt spray resistance ≥1000h, outdoor service life exceeding 15 years, and low indoor maintenance cost.
- Performance features:
- Efficient seismic protection: Equipped with seismic nodes such as articulated and spring-damped types, it can resist horizontal and vertical seismic forces, reducing the risk of water pipe rupture and falling. It complies with GB 50981 "Code for Seismic Design of Mechanical and Electrical Engineering in Buildings", is applicable to areas with seismic fortification intensity of 6 to 9 degrees, and can withstand horizontal acceleration loads ≥0.6g.
- Strong load-bearing capacity and stability: The load capacity of a single bracket ranges from 50kg to 800kg depending on the specification. Through triangular support or multi-directional constraint structure, it prevents water pipes from shifting or twisting due to vibration, ensuring the continuous operation of the water supply and drainage system during earthquakes.
- Flexible adaptation and compatibility: Compatible with galvanized steel pipes, stainless steel pipes, PE pipes, etc. with diameters from DN25 to DN300. The pipe diameter adaptation range can be adjusted through accessories such as pipe clamps and U-clamps. It can also share the base with air duct and cable tray seismic brackets, saving space.
- Technical parameters:
- Seismic node types: Articulated, universal ball hinge, spring-damped, etc. Horizontal displacement compensation ≥40mm, vertical displacement compensation ≥15mm.
- Installation spacing: For horizontal water pipes, the spacing is ≤18m for fortification intensity of 6-7 degrees, ≤12m for 8 degrees, and ≤6m for 9 degrees; For vertical water pipes, the spacing is ≤6m, with at least one per floor.
- Installation process:
- Positioning and setting out: Mark the bracket positions according to the design drawings. The spacing of horizontal pipe brackets shall meet the seismic fortification requirements. Vertical pipe brackets shall be at least one per floor, preferably 1.5-1.8m above the ground.
- Fixing the base: For concrete structures, fix the base with M10-M16 expansion bolts; For steel structures, use welding or bolt connection. Ensure that the base load-bearing capacity is ≥1.5 times the bracket load and is reliably connected to the building main body.
- Bracket assembly and adjustment: Assemble channel steel, seismic connectors and pipe clamps according to the drawings. Adjust the horizontality of the bracket (deviation ≤2mm/m) and verticality (deviation ≤3mm). The torque of node bolts shall reach 40-60N·m.
- Pipe fixation: After the pipe is installed, fasten it with pipe clamps. Place rubber gaskets between the clamps and the pipe to prevent wear. The articulated parts of seismic nodes shall remain flexible without affecting the thermal expansion and contraction of the pipe.
- Maintenance points:
- Regular inspection: Check whether the bolts are loose, whether there are cracks in the welds, and whether the anti-corrosion layer is damaged every quarter. Replace accessories or touch up paint in time if problems are found.
- Node maintenance: For spring-damped nodes, apply lithium-based grease every year and test the spring compression and rebound amount (should be ≥90%). For articulated nodes, check the wear of the pin shaft and replace it if the wear exceeds 1mm.
Pipeline linkage test: Combined with the pressure test of the pipeline system, check whether there is displacement at the fixed part between the bracket and the pipeline, ensuring that the pipe clamps fit closely with the pipeline without gaps or looseness.
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