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NACE MR0175 / ISO 15156 Sour Service & H2S Cracking
Free Download NACE MR0175 / ISO 15156 Sour Service & H2S Cracking
Download this premium online course featuring high-quality video training, step-by-step lessons, practical demonstrations, and expert instruction. With NACE MR0175 / ISO 15156 Sour Service & H2S Cracking, you'll gain practical knowledge through structured learning, hands-on examples, and real-world applications. This comprehensive eLearning resource is ideal for students, professionals, freelancers, and lifelong learners looking to develop valuable skills and stay current with modern industry practices at their own pace.
Published 8/2026
MP4 | Video: h264, 1920x1080 | Audio: AAC, 44.1 KHz, 2 Ch
Language: English | Duration: 4h 22m | Size: 2.69 GB
H2S partial pressure limits, SSC, HIC and SOHIC, hardness control, HIC-tested steel, welding and CRA qualification
What you'll learn
Determine whether a service is sour from H2S partial pressure, pH and chloride content
Navigate NACE MR0175 / ISO 15156 and find the governing requirement for a given material and service
Apply NACE MR0103 / ISO 17945 correctly in refinery service and know where the boundary sits
Explain and recognise SSC, HIC, SOHIC and soft zone cracking in service
Apply hardness limits correctly, including in the weld heat-affected zone where most failures occur
Specify HIC-resistant steel, its test method and its acceptance criteria, and read a mill certificate critically
Specify and qualify welding procedures for sour service, including hardness surveys and PWHT
Qualify corrosion-resistant alloys against the environmental limits in the standard
Extend sour service
Requirements
to bolting, springs, valve trim and small componentsReassess an existing asset when H2S content changes, and build a sour service management approach
Requirements
No prior metallurgy or sour service experience is required — the mechanisms are built up from the start
Any engineering or technical background is enough to follow the course
No mathematics beyond arithmetic — partial pressure is worked step by step
Helpful but not essential: some familiarity with pressure equipment, piping or material requisitions
A copy of NACE MR0175 / ISO 15156 is useful for reference afterwards but is not required to take the course
Description
This course contains the use of artificial intelligence.
▸ A vessel that meets every design code can still be non-compliant the day it arrives.
Sour service is not a design problem in the usual sense. The thickness calculation is fine, the code stamp is fine, the pressure test passes. What fails is the metallurgy — hardness in a weld heat-affected zone, a plate that was never HIC tested, a bolt that nobody thought about, a valve trim that was substituted at the vendor.
And it fails late. Sour service non-compliance is typically found at documentation review, at site, or after a crack appears — long after the equipment was paid for.
NACE MR0175 / ISO 15156 is the standard that governs it, and it is one of the most frequently referenced and least understood documents in oil and gas. Being written into a specification is not the same as being understood by the people applying it.
▸ A specification and compliance course
This course is built around the decisions you actually have to make and defend: is this service sour, which part of the standard applies, what does it require of the material, what does it require of the welding, and what documentation demonstrates that you complied.
The refinery side is covered properly too. NACE MR0103 / ISO 17945 applies where MR0175 does not, the boundary between them is a recurring source of specification error, and most available training ignores it entirely.
Five focused sections, worked through in an afternoon.
▸ What you will master
● Determine whether a service is sour — H2S partial pressure, pH, chlorides and the regions of the sour service diagrams
● Navigate the structure of NACE MR0175 / ISO 15156 across its parts and find the applicable requirement quickly
● Know when MR0103 / ISO 17945 applies instead, and why the refinery and production boundaries are so often confused
● Explain SSC, HIC, SOHIC and soft zone cracking — the mechanisms, the conditions and the appearance in service
● Apply hardness limits correctly, including the weld heat-affected zone where most non-compliances actually occur
● Specify HIC-resistant steel properly — the test method, the acceptance ratios and what a mill certificate does not tell you
● Specify welding for sour service, including procedure qualification, hardness surveys and PWHT
Requirements
● Qualify corrosion-resistant alloys for sour service under the environmental limits in the standard
● Extend the requirement correctly to bolting, springs, valve trim and small components — the classic omissions
● Reassess an existing asset when the service changes and the H2S content is no longer what it was designed for
▸
Who this course is for
● Materials, corrosion and integrity engineers responsible for sour service compliance
● Mechanical and pressure equipment engineers specifying vessels, piping and valves for sour duty
● Project and procurement engineers writing requisitions and reviewing vendor submissions
● Welding engineers qualifying procedures for sour service and running hardness surveys
● Inspection and quality engineers verifying compliance documentation and material traceability
● Operations and asset integrity teams facing a change in H2S content on an existing asset
▸ The knowledge that is hard to find
Sour service knowledge is concentrated in a small number of specialists, and everyone else works from a clause copied into a company specification. That works until the vendor asks a question, or offers an alternative, or the documentation arrives and someone has to decide whether it demonstrates compliance. At that point the person who understands the standard is worth a great deal, and the person who copied the clause is exposed.
The most common failure in this subject is not a wrong material. It is a correct material with the wrong documentation, discovered too late to do anything cheap about it.
▸ Why learn it here
Taught by a Chartered Engineer (CEng MIMechE) with over fifteen years delivering safety-critical projects in oil, gas and energy infrastructure — from the perspective of someone who has had to specify and defend sour service
Requirements
on live projects rather than summarise them from the standard.The standard has mandatory
Requirements
and user-selected options, and the difference matters commercially. This course identifies which is which throughout, and flags what to challenge in a vendor or contractor submission rather than accepting it.▸ What you get
● Structured on-demand video across 20 focused lessons and five sections
● A final exam
● All lectures presentations downloadable
● Lifetime access on mobile and TV, and a certificate of completion
▸ No prior metallurgy is required — the cracking mechanisms are built from first principles. Any engineering or technical background is enough to follow it.
Enrol now and stop copying a clause you cannot defend.
Who this course is for
Materials, corrosion and integrity engineers responsible for sour service compliance
Mechanical and pressure equipment engineers specifying equipment for sour duty
Project and procurement engineers writing requisitions and reviewing vendor submissions
Welding engineers qualifying procedures and running hardness surveys for sour service
Inspection and quality engineers verifying compliance documentation and traceability
Operations and asset integrity teams facing a change in H2S content on an existing asset
Homepage
https://www.udemy.com/course/nace-mr0175-iso-15156-sour-service-h2s-cracking/
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