IGEM/TD/13 Edition 3 Supplement 1 - Pressure regulating installations for hydrogen at pressures exceeding 7 bar
IGEM/TD/13 Standard applies to the safe design, construction, inspection, testing, operation and maintenance of pressure regulating installations (PRIs) and above 7 bar pipeline installations in accordance with current knowledge and operational experience.
This Supplement provides additional requirements for new PRIs and above 7 bar pipeline installation (subsequently referred to as “installations”) to be used for the transmission of Hydrogen, including Natural Gas/Hydrogen blended mixtures (subsequently referred to as NG/H blends), and for the repurposing of Natural Gas (NG) installations for Hydrogen service. The clause numbers in this Supplement (preceded by ‘S’), refer to the clause numbers in the main document and specify the requirements and qualifications which are in addition to those in the main document. Where there is no numbered clause in this supplement corresponding to a clause in the main document, the requirements of the main document apply in full.
The term Hydrogen service is used to indicate installations plant and equipment transporting Hydrogen or a NG/H blend. The requirements for Hydrogen service apply equally to NG/H blends, unless the text indicates that the requirement depends upon the concentration of Hydrogen in the blend.
NG/H blends are considered to be equivalent to 100 mol % Hydrogen with respect to limits on design stresses, the potential effect on the material properties, and damage and defect categories and acceptance levels, unless an additional technical evaluation is carried out to qualify the materials.
NG/H blends containing in excess of 10 mol % Hydrogen are considered to be equivalent to 100 mol % Hydrogen with respect to all other requirements except for hazardous areas (see Section 10).
This Supplement gives additional recommendations for installations:
- with an upstream maximum operating pressure (MOP) not greater than 100 bar
- with an outlet pressure greater than or equal to 7 bar
- for use with Hydrogen or NG/H blends with a Hydrogen content greater than 10 %
- operating with a temperature range between -20°C and 120°C.
It also gives additional requirements relating to the repurposing of NG installations to Hydrogen service. These requirements are in addition to those in the main body of the document which continue to be applied except where explicitly superseded by the requirements of this Supplement.
Repurposing in accordance with the requirements of this Supplement is to be considered only for installations which have full maintenance records in accordance with the recommendations of the main document.
Note: The material performance factors defined in ASME B31.12 are based on limiting the hoop stress, not derating the tensile properties. The design factors in Table S1 are based on the material performance factors for pressures not exceeding 137.9 barg (2,000 psig).
Introduction
S1.4 IGEM/TD/13 Standard applies to the safe design, construction, inspection, testing, operation and maintenance of pressure regulating installations (PRIs) and above 7 bar pipeline installations in accordance with current knowledge and operational experience.
This Supplement provides additional requirements for new PRIs and above 7 bar pipeline installation (subsequently referred to as “installations”) to be used for the transmission of Hydrogen, including Natural Gas/Hydrogen blended mixtures (subsequently referred to as NG/H blends), and for the repurposing of Natural Gas (NG) installations for Hydrogen service. The clause numbers in this Supplement (preceded by ‘S’), refer to the clause numbers in the main document and specify the requirements and qualifications which are in addition to those in the main document. Where there is no numbered clause in this supplement corresponding to a clause in the main document, the requirements of the main document apply in full.
The term Hydrogen service is used to indicate installations plant and equipment transporting Hydrogen or a NG/H blend. The requirements for Hydrogen service apply equally to NG/H blends, unless the text indicates that the requirement depends upon the concentration of Hydrogen in the blend.
S1.11 This Supplement was published in March 2024.
Scope
S2.1 NG/H blends are considered to be equivalent to 100 mol % Hydrogen with respect to limits on design stresses, the potential effect on the material properties, and damage and defect categories and acceptance levels, unless an additional technical evaluation is carried out to qualify the materials.
NG/H blends containing in excess of 10 mol % Hydrogen are considered to be equivalent to 100 mol % Hydrogen with respect to all other requirements except for hazardous areas (see Section 10).
This Supplement gives additional recommendations for installations:
- with an upstream maximum operating pressure (MOP) not greater than 100 bar
- with an outlet pressure greater than or equal to 7 bar
- for use with Hydrogen or NG/H blends with a Hydrogen content greater than 10 %
- operating with a temperature range between -20°C and 120°C.
S2.2 This Supplement also gives additional requirements relating to the repurposing of NG installations to Hydrogen service. These requirements are in addition to those in the main body of the document which continue to be applied except where explicitly superseded by the requirements of this Supplement.
Repurposing in accordance with the requirements of this Supplement is to be considered only for installations which have full maintenance records in accordance with the recommendations of the main document.
Note: The material performance factors defined in ASME B31.12 are based on limiting the hoop stress, not derating the tensile properties. The design factors in Table S1 are based on the material performance factors for pressures not exceeding 137.9 barg (2,000 psig)