Seismic bracing for water pipes

I. Performance Characteristics

1. High-Efficiency Seismic Protection

- Made of Q235B steel or stainless steel, paired with articulated, spring damping, and other seismic nodes, it can resist horizontal and vertical seismic forces, reducing the risk of water pipe breakage and detachment.

- Complies with GB 50981 "Code for Seismic Design of Mechanical and Electrical Engineering in Buildings," suitable for seismic fortification zones of intensity 6-9, capable of withstanding horizontal acceleration loads ≥0.6g.

2. Strong Load-Bearing Capacity and Stability

- Single bracket load capacity ranges from 50-800kg depending on specifications. Through triangular support or multi-directional restraint structures, it prevents water pipes from shifting or twisting due to vibrations, ensuring the continuous operation of water supply and drainage systems during earthquakes.

3. Flexible Adaptation and Compatibility

- Compatible with DN25-DN300 galvanized steel pipes, stainless steel pipes, PE pipes, etc. Pipe diameter adaptation range can be adjusted using pipe clamps, U-clamps, and other accessories. It can share a base with seismic brackets for air ducts and cable trays, saving space.

4. Corrosion Resistance and Durability

- Surface treated with hot-dip galvanizing (zinc layer ≥65μm), 304 stainless steel, or zinc-aluminum-magnesium coating, resistant to moisture, acid, and alkali corrosion. Outdoor service life exceeds 15 years, with low indoor maintenance costs.

II. Technical Parameters

Parameter Type Specific Indicators

Material Q235B steel, 304/316 stainless steel, tensile strength ≥375MPa, yield strength ≥235MPa (steel)

Surface Treatment Hot-dip galvanizing (zinc layer ≥65μm), stainless steel natural finish, epoxy spraying (dry film ≥80μm), salt spray resistance ≥1000h

Load Capacity Range Single bracket conventional load capacity 50-800kg, customizable for large-diameter pipes (e.g., above DN300)

Seismic Node Types Articulated, universal ball joint, spring damping type, horizontal displacement compensation ≥40mm, vertical displacement compensation ≥15mm

Installation Spacing - Horizontal water pipes: ≤18m for intensity 6-7 fortification, ≤12m for intensity 8, ≤6m for intensity 9 - Vertical water pipes: spacing ≤6m, at least one per floor

Applicable Pipe Specifications DN25-DN300, special specifications (e.g., high-pressure pipes) can have customized accessories

III. Usage Instructions

1. Installation Process

- Positioning and Marking: Mark bracket positions according to design drawings. Horizontal pipe bracket spacing must meet seismic fortification requirements (e.g., ≤12m for intensity 8 zones). Vertical pipe brackets should have at least one per floor, preferably 1.5-1.8m from the ground.

- Fixing the Base: Use M10-M16 expansion bolts to fix the base to concrete structures. For steel structures, use welding or bolt connections, ensuring the base load capacity is ≥1.5 times the bracket load and reliably connected to the main building structure.

- Bracket Assembly and Adjustment: Assemble channel steel, seismic connectors, and pipe clamps according to the drawings. Adjust bracket levelness (deviation ≤2mm/m) and verticality (deviation ≤3mm). Node bolt torque must reach 40-60N·m.

- Pipe Fixation: Tighten pipe clamps after pipe installation. Place rubber gaskets between clamps and pipes to prevent wear. Hinged parts of seismic nodes must remain freely movable without affecting pipe thermal expansion and contraction.

2. Maintenance Points

- Regular Inspection: Check bolts for looseness, welds for cracks, and anti-corrosion layers for damage quarterly. Replace accessories or repaint promptly if issues are found (use zinc paint for damaged hot-dip galvanized layers).

- Node Maintenance: Apply lithium-based grease to spring damping nodes annually. Test spring compression rebound (should be ≥90%). Check pin wear for articulated nodes; replace if wear exceeds 1mm.

- Pipe Linkage Test: During pipe system pressure testing, check for displacement at bracket and pipe fixation points. Ensure pipe clamps fit tightly against pipes with no gaps or looseness.

3. Precautions

- Standard Adaptation: Add brackets on both sides of expansion joints and settlement joints, using flexible connection nodes. Add seismic brackets at pipe bends, ends, and valve attachments (within ≤300mm of the interface).

- Fire and Explosion Prevention: Fire water pipe brackets must be made of non-combustible materials. Gas pipe brackets require anti-static design (e.g., bonding wires) and explosion-proof certification.

- Load Calculation: Before installation, calculate pipe weight (including water/medium) + insulation layer weight. Ensure bracket load capacity ≥1.2 times the actual load to avoid overload deformation.

IV. Selection Reference

- By Fortification Intensity: - Intensity 6-7: Use articulated brackets with horizontal spacing ≤18m; - Intensity 8: Use universal hinged brackets with spacing ≤12m; - Intensity 9: Use spring damping brackets with spacing ≤6m, vertical pipe bracket spacing ≤6m.

- By Pipe Diameter: - DN50-DN100 pipes: Use brackets with 100-200kg load capacity, paired with 41×41mm channel steel; - DN150-DN300 pipes: Use brackets with 300-800kg load capacity, using 62×41mm channel steel and reinforced pipe clamps.

Water Pipe Seismic Brackets, through standardized design and installation, effectively protect water supply, drainage, fire protection, and other pipe systems during earthquakes, reducing secondary disasters such as leaks and fires caused by pipe ruptures. They are core components of building mechanical and electrical seismic engineering.