Saffire NEWS
   
BS EN ISO 2503 : 1998
"Pressure regulators for gas cylinders used in
welding cutting and allied processes up to 300 bar"
 
CHANGES TO REGULATOR MARKINGS
   
The above standard has now been fully adopted in the UK and the equivalent British Standards withdrawn. This document covers all regulators used in welding and cutting applications.

The requirements for marking the operational data on regulators has changed and now requires the following:

"....the information shall be clearly and permanently marked on the pressure regulator body or cover or on a label which is permanently fixed to the regulator". In order to comply with this direction, Murex regulators will be modified to allow the information to be indelibly stamped onto the body. The benefits are that it is permanent and will remain visible throughout the working life of the regulator. The data will be positioned on the back of the regulator body in the following format:

TYPICAL OXYGEN REGULATOR MARKINGS
   

 
WHAT DO THESE MEAN?
GAS TYPE
Each gas is now designated by a code letter.
 
CODE LETTERS FOR GASES TO BE USED FOR MARKING OF PRESSURE REGULATORS
 
TYPE OF GAS
DESIGNATION
Acetylene
A
Oxygen
O
Hydrogen
H
Propane
P

CO2 Nitrogen

N
STANDARD
This guarantees that the regulator meets all the requirements of EN ISO 2503. Due to increase cylinder filling pressures in UK only regulators conforming to the current EN Standard should be used.
 
CLASS, MAXIMUM INLET PRESSURE AND MAXIMUM OUTLET PRESSURE
The table below shows the various regulator classes and the service ratings.
 
EQUIPMENT CLASSES
 
 
GAS
CLASS
INLET PRESSURE
OUTLET PRESSURE
Oxygen and other compressed gases up to 300 bar
0
1
2
3
0 - 300 bar
0 - 300 bar
0 - 300 bar
0 - 300 bar
2 bar
4 bar
6 bar
10 bar
Acetylene
2
25 bar
<1.5 bar
Propane
1
25 bar
4 bar
   
5 YEAR REPLACEMENT,
In line with the recommendations of BCGA Code of Practice 7, Pressure regulators should be replaced or refurbished after 5 years in service. This mark is a convenient way to identify the required replacement date ie 2004 would be shown on the body.
   
DATE STAMP
This is a Quality Control Code to identify the precise date upon which the unit was manufactured.
 
THE MUREX PRODUCT RANGE WILL HAVE 4 BASIC BODY STAMPINGS
 
 
OXYGEN
ACETYLENE
PROPANE
INERT GAS
 
Examples of the body stampings