CEN/TC 234/WG 4 - Gas underground storage

This European Standard covers the functional recommendations for the design, construction, testing, commissioning, operation, maintenance and abandonment of the surface facilities for underground gas storage (UGS), between the wellhead and the connection to the gas grid.
It specifies practices which are safe and environmentally acceptable.
For necessary subsurface facilities for underground storage, the relevant part of EN 1918-1 to EN 1918-4 applies.
In this context, "gas" is any hydrocarbon fuel:
-   which is in a gaseous state at a temperature of 15 °C and under a pressure of 0,1 MPa (this includes natural gas, compressed natural gas (CNG) and liquefied petroleum gas (LPG). The stored product is also named fluid);
-   which meets specific quality requirements in order to maintain underground storage integrity, performance, environmental compatibility and fulfils contractual requirements.
This European Standard specifies common basic principles for underground gas storage facilities. Users of this European Standard should be aware that more detailed standards and/or codes of practice exist. A non-exhaustive list of relevant standards can be found in Annex A.
This European Standard is intended to be applied in association with these national standards and/or codes of practice and does not replace them.
In the event of conflicts in terms of more restrictive requirements in the national legislation/regulation with the requirements of this European Standard, the national legislation/regulation takes precedence as illustrated in CEN/TR 13737 (all parts).
NOTE   CEN/TR 13737 (all parts) contains:
-   clarification of relevant legislation/regulations applicable in a country;
-   if appropriate, more restrictive national requirements;
-   national contact point for the latest information.
This European Standard is not intended to be applied retrospectively to existing facilities.

This European Standard covers the functional recommendations for design, construction, testing, commissioning, operation, maintenance and abandonment of underground gas storage (UGS) facilities in mined rock caverns up to and including the wellhead.
This European Standard does not cover the technology of lined rock.
NOTE 1   Even if not covered in this standard, the lined rock is an available technology.
This European Standard specifies practices which are safe and environmentally acceptable.
For necessary surface facilities for underground gas storage, EN 1918-5 applies.
In this context, "gas" is any hydrocarbon fuel:
-   which is in a gaseous state at a temperature of 15 °C and under a pressure of 0,1 MPa (this includes natural gas, compressed natural gas (CNG) and liquefied petroleum gas (LPG). The stored product is also named fluid);
-   which meets specific quality requirements in order to maintain underground storage integrity, performance, environmental compatibility and fulfils contractual requirements.
This European Standard specifies common basic principles for underground gas storage facilities. Users of this European Standard should be aware that more detailed standards and/or codes of practice exist. A non-exhaustive list of relevant standards can be found in Annex A.
This European Standard is intended to be applied in association with these national standards and/or codes of practice and does not replace them.
In the event of conflicts in terms of more restrictive requirements in the national legislation/regulation with the requirements of this European Standard, the national legislation/regulation takes precedence as illustrated in CEN/TR 13737 (all parts).
NOTE 2   CEN/TR 13737 (all parts) contains:
-   clarification of relevant legislation/regulations applicable in a country;
-   if appropriate, more restrictive national requirements;
-   national contact point for the latest information.
This European Standard is not intended to be applied retrospectively to existing facilities.

This European Standard covers the functional recommendations for design, construction, testing, commissioning, operation, maintenance and abandonment of underground gas storage (UGS) facilities in aquifers up to and including the wellhead.
It specifies practices, which are safe and environmentally acceptable.
For necessary surface facilities for underground gas storage, EN 1918-5 applies.
In this context "gas" is any hydrocarbon fuel:
-   which is in a gaseous state at a temperature of 15 °C and under a pressure of 0,1 MPa (this includes natural gas, compressed natural gas (CNG) and liquefied petroleum gas (LPG). The stored product is also named fluid);
-   which meets specific quality requirements in order to maintain underground storage integrity, performance, environmental compatibility and fulfils contractual requirements.
This European Standard specifies common basic principles for underground gas storage facilities. Users of this European Standard should be aware that more detailed standards and/or codes of practice exist. A non-exhaustive list of relevant standards can be found in Annex A.
This European Standard is intended to be applied in association with these national standards and/or codes of practice and does not replace them.
In the event of conflicts in terms of more restrictive requirements in the national legislation/regulation with the requirements of this European Standard, the national legislation/regulation takes precedence as illustrated in CEN/TR 13737 (all parts).
NOTE   CEN/TR 13737 (all parts) contains:
-   clarification of relevant legislation/regulations applicable in a country;
-   if appropriate, more restrictive national requirements;
-   national contact point for the latest information.
This European Standard is not intended to be applied retrospectively to existing facilities.

This European Standard covers the functional recommendations for design, construction, testing, commissioning, operation, maintenance and abandonment of underground gas storage facilities in oil and gas fields up to and including the wellhead.
It specifies practices which are safe and environmentally acceptable.
For necessary surface facilities for underground gas storage, FprEN 1918-5 applies.
In this context "gas" is any hydrocarbon fuel:
-   which is in a gaseous state at a temperature of 15 °C and under a pressure of 0,1 MPa (this includes natural gas, compressed natural gas (CNG) and liquefied petroleum gas (LPG). The stored product is also named fluid);
-   which meets specific quality requirements in order to maintain underground storage integrity, performance, environmental compatibility and fulfils contractual requirements.
This European Standard specifies common basic principles for underground gas storage facilities. Users of this European Standard should be aware that more detailed standards and/or codes of practice exist. A non-exhaustive list of relevant standards can be found in Annex A.
This European Standard is intended to be applied in association with these national standards and/or codes of practice and does not replace them.
In the event of conflicts in terms of more restrictive requirements in the national legislation/regulation with the requirements of this European Standard, the national legislation/regulation takes precedence as illustrated in CEN/TR 13737 (all parts).
NOTE   CEN/TR 13737 (all parts) contains:
-   clarification of relevant legislation/regulations applicable in a country;
-   if appropriate, more restrictive national requirements;
-   national contact point for the latest information.
This European Standard is not intended to be applied retrospectively to existing facilities.

This European Standard covers the functional recommendations for design, construction, testing, commissioning, operation, maintenance and abandonment of underground gas storage (UGS) facilities in solution-mined salt caverns up to and including the wellhead.
It specifies practices which are safe and environmentally acceptable.
For necessary surface facilities for underground gas storage, EN 1918-5 applies.
In this context "gas" is any hydrocarbon fuel:
—   which is in a gaseous state at a temperature of 15 °C and under a pressure of 0,1 MPa (this includes natural gas, compressed natural gas (CNG) and liquefied petroleum gas (LPG). The stored product is also named fluid);
—   which meets specific quality requirements in order to maintain underground storage integrity, performance, environmental compatibility and fulfils contractual requirements.
This European Standard specifies common basic principles for underground gas storage facilities. Users of this European Standard should be aware that more detailed standards and/or codes of practice exist. A non-exhaustive list of relevant standards can be found in Annex A.
This European Standard is intended to be applied in association with these national standards and/or codes of practice and does not replace them.
In the event of conflicts in terms of more restrictive requirements in the national legislation/regulation with the requirements of this European Standard, the national legislation/regulation takes precedence as illustrated in CEN/TR 13737 (all parts).
NOTE   CEN/TR 13737 (all parts) contains:
—   clarification of relevant legislation/regulations applicable in a country;
—   if appropriate, more restrictive national requirements;
—   national contact point for the latest information.
This European Standard is not intended to be applied retrospectively to existing facilities.

This standard lists the general functional recommendations for the surface facilities relating to underground gas storage. It specifies procedures and practices which are safe and environmentally acceptable. It describes the functional recommendations for the design, construction, testing, commissioning, operation and maintenance of the surface facilities for underground gas storage, between the wellhead and the connection to the gas transmission system.

This standard specifies procedures and practices which are safe and environmentally acceptable. It covers the functional recommendations for design, construction, testing, commissionning, operation and maintenance of underground gas storage facilities in aquifers up to and including the wing valve of the wellhead. The necessary surface facilities for underground gas storage are described in prEN 1918-5.

This standard specifies procedures and practices which are safe and environmentally acceptable. It covers the functional recommendations for design, construction, testing, commissionning, operation and maintenance of underground gas storage facilities in solution-mined salt cavities up to and including the wing valve of the wellhead. The necessary surface facilities for underground gas storage are described in prEN 1918-5.

This standard specifies procedures and practices which are safe and environmentally acceptable. It covers the functional recommendations for design, construction, testing, commissioning, operation and maintenance of underground gas storage facilities in oil and gas fields up to and including the wing valve of the wellhead. The necessary surface facilities for underground gas storage are described in prEN 1918-5.

This standard specifies procedures and practices which are safe and environmentally acceptable. It covers the functional recommendations for design, construction, testing, commissioning, operation  and maintenance of underground gas storage facilities in rock caverns up to and including the top flanges of the casings. It does not cover refrigerated gas storage. The necessary surface facilities for an underground gas storage are described in EN 1918-5.