17-10-2012, 05:22 PM
TECHNICAL SPECIFICATION OF HOT COILED HELICAL SPRINGS
USED IN LOCOMOTIVES
TECHNICAL SPECIFICATION OF HOT COILED.pdf (Size: 827.9 KB / Downloads: 597)
TECHNICAL SPECIFICATION OF HOT COILED HELICAL SPRINGS USED IN LOCOMOTIVES
SCOPE
This specification is intended to cover requirements of heavy-duty steel springs, which call for stricter
control in raw material quality, manufacturing processes and Testing/ Inspection standards to improve
their reliability and life.
This Specification is applicable for high performance hot-coiled helical compression springs used in the
suspension system of Diesel & Electric Locomotives on Indian Railways included in Annexure I of this
document. It covers springs, which are to be manufactured from circular section bars.
DEFINITIONS
• Wherever “Inspecting Official” has been mentioned in this document, it shall be taken as “Authorized
Representative of RDSO” as mentioned in the Purchase Order.
• The “Hot Coiled Helical Compression Steel Springs used in the suspension system of Diesel & Electric
Locomotives” shall henceforth be referred to as “springs” in this specification.
• Other terms used in this specification, and their definitions are:
o “STR” means “Schedule of Technical Requirements”.
o “QAP” means “Quality Assurance Plan”.
o “Manufacturer” means the “manufacturer of springs”.
o “Purchase Order” means “Purchase Order for springs”.
INSTRUCTIONS FOR PURCHASER
The tenderer shall be an RDSO Approved Vendor for supply of hot-coiled helical compression springs for
locomotives.
Inspection of helical coil springs shall be carried out by RDSO. The Purchaser shall clearly indicate this in
the Purchase Order.
The material, manufacturing and testing of helical coil springs shall conform to this specification. The
Purchaser shall clearly indicate this in the Purchase Order.
REFERENCE DOCUMENTS AND STANDARDS
This specification covers manufacture and supply of locomotive springs to be supplied to Railways.
Procurement of spring steel rounds shall be done only from the spring steel manufacturers approved by
RDSO. The inspection of spring steel rounds shall be carried out by RDSO to ensure their proper &
prescribed quality and to avoid non-conformance / failure of final product (i.e. springs) during inspection/
service. Only spring steel rounds duly inspected and passed by RDSO shall be used for manufacture of
springs.