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Nace MR0175 Tubing And Casing

I. Anti-H2S corrosion tubing and casing

APPLICABLE STANDARDS
API SPEC 5CT Specification for casing and Tubing.
ANSI/NACE MR0175 Metals sulfide stress cracking and stress corrosion resistance in sour oilfield environment.
ANSI/NACE TM0177 Laboratory testing of metals for resistance to sulfide stress cracking and stress corrosion cracking in H2S environment.
ISO 15156 Petroleum and natural gas industries-material for use in H2S containing environments in oil and gas production.
ISO 13680 Petroleum and natural gas industries corrosion-resistant seamless tubes for use as casing , tubing and coupling stock technical delivery conditions third edition.

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I. Anti-H2S corrosion tubing and casing

APPLICABLE STANDARDS

API SPEC 5CT Specification for casing and Tubing.

ANSI/NACE MR0175 Metals sulfide stress cracking and stress corrosion resistance in sour oilfield environment.

ANSI/NACE TM0177 Laboratory testing of metals for resistance to sulfide stress cracking and stress corrosion cracking in H2S environment.

ISO 15156 Petroleum and natural gas industries-material for use in H2S containing environments in oil and gas production.

ISO 13680 Petroleum and natural gas industries corrosion-resistant seamless tubes for use as casing , tubing and coupling stock technical delivery conditions third edition.

Mechanical Property

Grade	Product Name	Yield strength(MPa)		Tensile Strength(Mpa)	Elogation	Charpy V-impact/J	Max. Hardness/(HRC)
		Min	Max	Min
80	BL80S	552	655	655	Calculated according to API 5CT formula	According to API 5ct	80
	BL80SS
90	BL90S	621	724	689			90
	BL90SS
95	BL95S	655	758	724			95
	BL95SS
110	BL110S	758	862	793			110
	BL110S

Corrosion Resistance

Product Name	Requirements of anti- corrosion Nature
	H2S Stress Corrosion Cracking Test (SSC)
	Solution A according to NACE TM 0177 A, without crack after 720 Hours
	Ø6.35/Sample	Ø3.81/Sample
	Loading SMYS value
BL80S, BL90S, BL95S	85%	76%
BL80SS, BL90SS, BL 95SS	90%	80%
BL110S	80%	72%
BL110SS	85%	76%