NACE MR0175 - Petroleum and Natural Gas Industries - Materials for Use in H2S Environments

Standard System: NACE
Current Edition: 2015
Equivalent Standards: ISO 15156

NACE MR0175/ISO 15156 Petroleum and natural gas industries - Materials for use in H2S-containing environments in oil and gas production. THE most important corrosion control standard in oil & gas. Referenced by API 15S and 17J for sour service material qualification. Covers carbon/low-alloy steels, CRAs, and non-metallic materials.

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RP 5B1 Spec 5B Spec 5CT Spec 5L T 39096 632-80 3183

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Same Category

3183 632-80 39096 5L 5B 5CT 5B1

### NACE

TM0298

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How to Apply NACE MR0175 in Inspection

Applying NACE MR0175 starts with confirming the edition named in the contract, the product scope, and any purchaser-specific additions. Material system, dimensions, pressure or temperature rating, manufacturing route, and service environment should be mapped to the clauses that actually apply. Before testing, the inspection and test plan should define sampling frequency, specimen conditioning, calibrated equipment, witness points, acceptance criteria, and retest rules. A traceable report records sample and batch identity, the method and edition used, environmental conditions, raw observations, calculations, measurement uncertainty where relevant, deviations, and the decision against each requirement. This evidence chain supports purchasing acceptance, manufacturing release, engineering qualification, and dispute resolution. This page is an aid to discovery and interpretation; the current official publication remains the controlling source whenever its wording differs from this summary.

The sampling plan determines the population represented by the conclusion. Incoming inspection, first-article approval, type qualification, and production release carry different frequencies and risk levels; one selected specimen cannot stand in for a batch. Before shipment, confirm specimen count, dimensional tolerances, machining and end treatment, conditioning, and transport protection. During review, consider dispersion, failure mode, and raw curves as well as the reported average. Any anomaly should be investigated under a predefined retest rule so that an independent reviewer can reproduce the final decision.