RUIHUA HARDWARE makes four flange clamp lines under the SAE J518 / ISO 6162 standard. Pick by pressure class (L-Series or S-Series) and structure (whole or split). All four are in stock and ship worldwide.
L-Series · Light
FL-W — L-Series Whole Flange Clamp
One-piece ring that slides over the tube before assembly. Delivers uniform 360° clamping force with fewer loose parts. Good for production lines and new OEM builds.
Note: Dimensions above are from RUIHUA HARDWARE standard production drawings. For tolerance-critical applications, request a certified dimensional report before ordering.
Whole vs. Split Flange Clamps — Quick Selection Guide
Both types meet the same SAE / ISO standards. The right choice depends on whether you're building from scratch or servicing in the field.
Factor
Whole (FL-W / FS-W)
Split (FL / FS)
Structure
One-piece ring
Two bolted halves
How to install
Slide over tube before flaring
Bolt around existing connection
Best use case
New assemblies, OEM lines
Field repair, retrofit, confined spaces
Clamping force
360° uniform, no seam
Very good — follow torque sequence
Part count
1 piece + bolts
2 halves + bolts
Typical cost
Slightly lower
Slightly higher
RUIHUA HARDWARE range
FL-W (L) · FS-W (S), up to 3"
FL (L) · FS (S), up to 3"
Why RUIHUA HARDWARE Flange Clamps
CNC-Machined Bolt Holes
Tight PCD tolerances. Bolts seat straight every time — no cross-threading on high-volume assembly lines.
Zinc Plating — 96-Hour NSS
Standard finish clears neutral salt-spray testing. Geomet® and zinc-nickel available for offshore or marine use.
Full Size Range: 1/2" to 3"
Both series cover DN 12 through DN 48. Custom bore sizes machined on request with 3-week lead time.
SAE J518 + ISO 6162 Compliant
Drop-in replacement for Parker, Eaton, Gates, and Manuli flange clamps. Same bolt pattern, same face dimensions.
Global Export — Trusted by OEMs
RUIHUA HARDWARE ships to Europe, Central Asia, Southeast Asia, and Africa. EXW, FOB, and CIF terms available.
OEM / Private Label Ready
Custom packaging, laser-engraved part numbers, and branded bags available for distributors and OEM customers.
Where RUIHUA HARDWARE Flange Clamps Are Used
Agricultural Machinery
Tractors, harvesters, sprayers. L-Series clamps handle the constant vibration and outdoor exposure of mobile farm equipment.
Construction Equipment
Excavators, wheel loaders, bulldozers. S-Series covers the high-shock loads and pressures above 350 bar typical in earthmoving hydraulics.
Industrial Power Units
Presses, injection-molding machines, and HPUs. Standardized SAE flanges make modular system design straightforward.
Mining & Offshore
Corrosive environments need Geomet® or zinc-nickel coatings. S-Series body thickness handles shock and vibration underground or offshore.
Material Handling
Forklifts, cranes, lifting platforms. L-Series whole clamps keep part count low in tight hydraulic circuits.
Oil & Gas
Wellhead control panels, workover rigs. Split clamps let technicians service connections without dismantling the entire circuit.
Frequently Asked Questions
Questions our customers ask most often about RUIHUA HARDWARE flange clamps.
RUIHUA HARDWARE — Flange Clamp Manufacturer
RUIHUA HARDWARE is a China-based manufacturer of hydraulic fittings, flange clamps, hose clamps, and fluid-control accessories. We sell direct to distributors and OEMs worldwide.
Factory Direct
No trading company in the middle. Prices, lead times, and technical specs come straight from the production floor.
Batch Inspection
PCD, bolt-hole diameter, face flatness, and plating thickness checked every batch. CMM reports available on request.
Established Export Network
Regular shipments to the EU, Eastern Europe, Central Asia, and Southeast Asia. Familiar with CE documentation requirements.
Custom Engineering
Non-standard sizes, special alloys, private-label packaging — handled in-house with a 3-week average lead time.
