EN ISO 17945:2015

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Responsibilities
6 Factors contributing to SSC
7 Materials included in this International Standard
8 Hardness requirements
9 Procedure for the addition of new materials or processes
10 New restrictions and deleted materials
11 Qualification of unlisted alloys, conditions, and/or processes
   for specific applications
12 Standard road map
13 Ferrous materials
14 Nonferrous materials
15 Fabrication requirements
16 Bolting
17 Plating, coatings, and diffusion processes
18 Special components
19 Valves
20 Compressors and pumps
Annex A (informative) - Sulfide species plot
Annex B (informative) - Background information on
        hardness testing and requirements
Annex C (normative) - Welding procedure qualification
        hardness survey layouts
Bibliography

ISO 17945:2015 establishes material requirements for resistance to SSC in sour petroleum refining and related processing environments containing H2S either as a gas or dissolved in an aqueous (liquid water) phase with or without the presence of hydrocarbon. This International Standard does not include and is not intended to include design specifications. Other forms of wet H2S cracking, environmental cracking, corrosion, and other modes of failure are outside the scope of this International Standard. It is intended to be used by refiners, equipment manufacturers, engineering contractors, and construction contractors.Specifically, this International Standard is directed at the prevention of SSC of equipment (including pressure vessels, heat exchangers, piping, valve bodies, and pump and compressor cases) and components used in the refining industry. Prevention of SSC in carbon steel categorized under P-No. 1 in Section IX of the ASME Boiler and Pressure Vessel Code (BPVC) is addressed by requiring compliance with NACE SP0472.ISO 17945:2015 applies to all components of equipment exposed to sour refinery environments (see Clause 6) where failure by SSC would (1) compromise the integrity of the pressure-containment system, (2) prevent the basic function of the equipment, and/or (3) prevent the equipment from being restored to an operating condition while continuing to contain pressure.