BS EN 12007-1:2012 pdf download

BS EN 12007-1:2012 pdf download.Gas infrastructure – Pipelines for maximum operating pressure up to and including 16bar Part 1: General functional requirements.
3.2.2
design pressure
DP
pressure on which design calculations are based
3.2.3
maximum operating pressure
MOP
maximum pressure at which a system can be operated continuously under normal operating conditions
Nole 1 to entJy Normal operabng conditions means no fault many device or seam.
32.4
temporary operating pressure
TOP
pressure at which a system can be operated ternporanly under control of the regulating devices
3.2.5
maximum incidental pr.ssur.
MIP
maximum pressure Which a system can expeflence dunng a short tii,e, limited by the safety devices
3.2.6
strength test pressure
STP
pressure applied to a system during strength testing
3.2.7
combined test pressure
CTP
pressure applied to a system during combined testing
4 Quality
4.1 Quality and safety management
To provide a consistent and appropriate standard of quality management the pipeline operator shall have organizational, operational and administrative procedures to ensure that activities can be undertaken in a safe and technically sound manner. The pipeline operator shall have suitable systems for technical audit, safety audit and performance review to ensure that established procedures and training programmes continue to meet the obligations of the pipeline operator to users. These should take into account experiences gained.
EXAMPLE I Operations incidents or other relevant dangerous occurrences.
This system should include, for each activity:
adequate numbers of competent persons; and
— adequate other resources.
EXAMPLE 2 Vetedes. coninunication systems and appropriate tools.
4.2 Competence
The qualification of competent persons involved in the design, construction, operation and maintenance of a gas infrastructure, or parts of it. shall be in accordance with the characteristics of the pipeline system they are working on. These characteristics Include, but are not limited to the following:
— fornily of gas;
— local conditions;
— desIgn or operating pressure;
— materials used in the system;
— jointing techniques; and emergency procedures
5 Gas characteristics
5.1 Gas quality and family
The quality and family of gas supplied through a gas infrastructure shall be specified so that its characteristics are known to system designers and pipeline operators. This specification includes all relevant characlenstics which contribute to safe operation and combustion, Changes in the properties of the gas which fall outside pre-determined operating limits shall be notified to pipeline operators in advance.
Gas may also be treated or conditioned for operational and maintenance reasons.
EXAMPLE 1 For the control of leakage.
EXAMPLE 2 For the control of .ong condihons at pressure regu4ating stations and installations.
Safe operating procedures for systems supplying gases heavier than aw shall recogrnze the tendency for
these gases to settle downwards should they escape from the system.
5.2 Odorization
Gas supplied to end users should possess a distinctive odour.
Where gas is to possess a distinctive odour its presence in the atmosphere shall be readily detectable at aN gas concentrations of 20 % of the lower explosive limit and above Where the gas does not possess a natural distinctive odour one shall be added for the purpose.
The odorant. where added, shall be non-toxic and harmless for the concentrations employed in normal applications, and the odour shall disappear after oombustion
An odorant may be omitted in gas delivered specifically for further processing or other special pUrposes. In this case alternative means shall be available to detect Ieals.
5.3 ToxIcity and lack of oxygen
The potential toxic effects of gas constituents and the potential lack of oxygen shall be considered to ensure safety in all work practices undertaken on the gas infrastructure, in using the gas and in dealing with escaping gas.
6 Materials
The characteristics of materials of pipes, fittings and components and the mode of construction of pipelines shall be appropnate to the types of gas being supplied and the conditions under which they are operated.