Railway Fastening Dog Spike

Model

Head Type

Shank Type

Surface Treatment

Applicable Sleeper Type

Maintenance Cycle

Compliance Stds

DS-105-LT

Square Head

Smooth Shank

Hot-dip galvanizing (≥85μm)

Wooden Sleeper (Light Rail)

12 Months

GB/T 152-2019, EN 13684-1

DS-130-MF

Round Head

Ribbed Shank

Electro-galvanizing (≥25μm)

Concrete Sleeper (Mainline)

18 Months

GB/T 152-2019, AREMA 30

DS-155-HDM

Hex Head

Threaded Shank

Dacromet (≥8μm) + Zinc Plating

Composite Sleeper (Heavy-Haul)

24 Months

GB/T 152-2019, AREMA 30

DS-95-Metro

Countersunk Head

Smooth Shank

Epoxy Coating (≥60μm)

Wooden Sleeper (Urban Metro)

15 Months

GB/T 152-2019, TB/T 3395.2

DS-115-HS-Aux

Square Head

Ribbed Shank

Hot-dip galvanizing (≥100μm)

Concrete Sleeper (HSR Auxiliary)

20 Months

GB/T 152-2019, TB/T 3395.3

Management Stage

Key Item

Test/Operation Method

Sampling/Execution Rule

Tool/Reference

Incoming Inspection

Material & Environmental Compliance

Handheld PMI + RoHS Test

5 pcs/batch; 8 pcs/batch

Portable PMI Analyzer; RoHS Detector

Installation

Driving Efficiency & Fit

Stopwatch + Sleeper Hole Gauge

15 pcs/100m track

Digital Stopwatch; Precision Hole Gauge

In-Service Check

Pull-Out Force & Coating Wear

Pull-Test Machine + Thickness Gauge

3 pcs/km quarterly

Digital Pull-Test Machine; Magnetic Thickness Gauge

Emergency Maintenance

Replacement Speed

Mock Emergency Replacement

10 pcs/500m track (annual drill)

Standard Driving Hammer + Puller Tool

Batch Audit

Head & Shank Integrity

Impact Test + Bending Test

2% of Batch (Min. 3 Pcs)

Charpy Impact Tester; Bending Test Bench