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Attribute
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ASME B31.1 - Power
Piping Code
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ASME B31.3 -
Process Piping Code
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Industries
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Electrical power generating stations,
industrial and institutional plants,
geothermal heating systems,
central and district heating and cooling systems
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Petroleum refineries,
chemical,
pharmaceutical,
textile,
paper,
semiconductor,
cryogenic plants,
related processing plants and terminals
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Application
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Boiler external piping in which:
steam or vapor is generated at greater than 15 psig (100
kPa);
and water is generated at greater than 160 psig (1103 kPa)
and/or temperatures exceeding 250°F (120°C).
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Piping for all fluids including:
raw, intermediate, and finished chemicals; petroleum
products;
gas, steam, air and water;
fluidized solids;
refrigerants;
cryogenic fluids.
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Sections to which
Magnetrol complies
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N/A
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Standard Category
Category D Fluid Service
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Sections to which
Magnetrol does not comply
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N/A
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Standard Category for Severe Cyclic Service Category M
Fluid Service
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Allowable stresses
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Per code
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Per code
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Weld design
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Full penetration circumferential and chamber branch welds
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Full penetration circumferential and chamber branch welds
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Welders
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ASME Qualified
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ASME Qualified
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Weld procedures
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ASME Section IX qualified weld procedures
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ASME Section IX qualified weld procedures
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Branch Connections
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Integrally reinforced forged branch outlet fittings
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Integrally reinforced forged branch outlet fittings
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Materials of
Construction
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ASME grade materials
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ASME grade materials
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Material
Certification
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Certificate of Conformance on pressure boundary parts
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Certificate of Conformance on pressure boundary parts
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Carbon Steel
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Use limited to 800°F
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Use limited to 1100°F with reduced allowable
stresses
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Weld examination
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100% visual inspection for full penetration for 600# ANSI
class and above;
100% radiographic examination of circumferential body
welds and liquid penetrant testing of branch welds over 750°F
temperature
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100% visual inspection for full penetration for 1500# ANSI
class and above;
5% radiographic examination all temperatures
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Post weld heat
treatment
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All units constructed of chrome-moly high alloy steel.
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N/A
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Hydrostatic testing
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Certified 10 minute hydrostatic test at 1.5 times the
rated pressure
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Certified 10 minute hydrostatic test at 1.5 times the
rated pressure
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Documentation
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Certificate of compliance to ASME B31.1
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Certificate of compliance to ASME B31.3
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Standard
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MR0175-2003 and MR0175/ISO 15156
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MR0103-2003
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| Title
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“Petroleum
and Natural Gas Industries--Materials for use in Hydrogen Sulfide (H2S)-containing
Environments in Oil and Gas Production”
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“Materials
Resistant to Sulfide Stress Cracking in Corrosive Petroleum Refining
Environments”
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Application
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Sour
oilfield environments/oil and gas production (upstream)
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Refinery
applications/refining and gas processing (downstream)
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Definition of Sour Service
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Applies
when,
partial
pressure of H2S in wet gas phase > 0.05 psia (0.0003
MPa)
and system pressure > 65
psia (0.45 Mpa).
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Applies
when,
dissolved
H2S in free water is > 50 ppmw
or free water pH < 4 and
some dissolved H2S
or free water pH > 7.6
and hydrogen cyanide (HCN) > 20 ppmw and some dissolved H2S
or partial pressure of H2S
in wet gas phase > 0.05 psia (0.0003 MPa)
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Concerns
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Considers
sulfide stress cracking (SSC) and chloride stress corrosion cracking (SCC)
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Considers
sulfide stress cracking (SSC), free water pH, and HCN
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User Responsibility
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User
is responsible for determining and judging whether the environmental
conditions are such that the material requirement of the Standard should be
applied.
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User
is responsible for determining and judging whether the environmental
conditions are such that the material requirement of the Standard should be
applied.
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Judgement
is permitted in materials selection based upon NACE guidelines, plant
experience and risk analysis.
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Judgement
is permitted in materials selection based upon NACE guidelines, plant
experience and risk analysis.
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300 Series SS
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No
maximum temp for 300 series stainless steels
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No
maximum temp for 300 series stainless steels
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Manufacturer Responsibility
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Compliance
with material requirements (i.e. grade, hardness, etc.) for user specified
materials.
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Compliance
with material requirements (i.e. grade, hardness, etc.) for user specified
materials.
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Magnetrol>
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Met
by Magnetrol’s NACE construction including PWHT of all carbon steel and
solution annealing of SS if necessary.
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Met
by Magnetrol’s NACE construction including PWHT of all carbon steel and
solution annealing of SS if necessary.
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Post-weld Hardness Requirements
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A-106
carbon steel and 300 SS max hardness of 22 RC, A-105 max hardness of 187
brinell in the base metal, HAZ and weld material.
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A-106
carbon steel and 300 SS max hardness of 22 RC, A-105 max hardness of 187 brinell
in the base metal, HAZ and weld material.
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