Crane Rail Alignment Inspection Tools & Instruments
Precision measuring and monitoring instruments for rail joint quality verification, weld gap control, and gas flow calibration — supporting DIN and ISO acceptance standards.
Inspection Instruments
Precision Measurement & Monitoring for Rail Weld Quality
Seven essential instruments for gas flow control, preheat timing, joint geometry verification, and final acceptance inspection — enabling every weld to meet the dimensional and mechanical requirements of international rail welding standards.
Oxygen Flow Meter (LZB-10)
Custom flow metering instrument for calibrating and monitoring oxygen delivery during the rail preheating phase. Critical for achieving the correct preheat temperature across the rail head and web sections. Allows the welding operator to set and verify flow rates against the welding procedure specification parameters for each rail profile.
- Measuring Range: 100–1000 L/h
- Weight: 1.5 kg
- Application: Preheat oxygen flow calibration
Oxygen Regulator (YQY-1A)
Precision oxygen pressure regulating instrument for controlling cylinder-to-preheater gas supply. Ensures stable delivery pressure regardless of cylinder pressure drop during extended welding operations, maintaining consistent preheater flame characteristics across multiple joints.
- Max Inlet Pressure: 15 MPa
- Max Outlet Pressure: 2 MPa
- Material: Brass construction
- Weight: 1.84 kg
Propane Pressure Regulator (YQW-03)
Dedicated propane/LPG pressure regulating instrument for the preheater fuel supply circuit. Designed for field welding environments with standard LPG cylinder connections. Maintains consistent fuel gas pressure for stable preheater flame throughout the preheat cycle.
- Rated Pressure: 1.6 MPa
- Weight: 1.2 kg
- Application: LPG fuel pressure regulation
Stopwatch
Purpose-built timing instrument for managing preheat duration and weld flash trimming intervals. Accurate timing is non-negotiable for repeatable weld quality across a project’s full joint count. Critical for maintaining consistent preheat cycles and the specified trimming windows in welding procedure documentation.
- Application: Preheat timing & trimming cycle timing
- Design: Lightweight, field-optimized
Rail Alignment Straightedge (1000 mm)
Custom stainless steel straightedge for precision measurement of rail head alignment at the weld joint. Spans the weld joint and adjacent rail sections, revealing any misalignment that would cause accelerated wheel wear or impact loading in service. Used to verify vertical and horizontal alignment meets the ≤2 mm tolerance requirement per DIN and ISO rail welding standards.
- Material: Stainless steel
- Length: 1000 mm
- Thickness: 8 mm
- Weight: 2.4 kg
- Application: Rail head alignment verification per DIN/ISO
Rail Gap Gauge
Custom measuring tool for verifying weld gap between rail ends before thermite pouring — the most critical dimensional check before mold placement. The specified reserved rail gap of 26 ± 2 mm can be quickly verified with this gauge before proceeding with mold assembly and preheating. An incorrect gap directly affects weld metal volume, penetration depth, and final joint strength.
- Material: Aluminum alloy
- Measuring Range: 16–71 mm
- Length: 240 mm | Thickness: 8 mm
- Target Gap: 26 ± 2 mm (reserved gap specification)
Wedge Iron
Carbon steel wedge for fine adjustment of rail joint height differences and achieving lateral alignment before final welding. Used in combination with the rail aligner to achieve the final position adjustment before mold placement. Allows precise vertical correction when rail ends are not perfectly level after rough alignment.
- Material: Carbon steel
- Weight: 6 kg
- Dimensions: 150 × 40 × 20 mm (tapered)
- Application: Height & lateral alignment adjustment
