API 570 Piping Inspection Support in Indiana

Short answer: API 570 inspection of Indiana process piping, whether at the Whiting refinery, the Mount Vernon refinery, a Calumet Region by-product plant or a chemical, pharmaceutical or ethanol site, is directed and signed by the owner's API 570 Authorized Inspector (AI). Atlantis NDT supplies the examinations behind it: CML thickness surveys, corrosion mapping, profile RT, guided-wave screening, CUI follow-up and weld PAUT or TOFD. Atlantis performs the NDE; your API 570 Authorized Inspector remains inspector of record and signs the inspection report.

Indiana's piping map is lopsided. One very large refinery on the Lake Michigan shore at Whiting accounts for a big share of the state's refinery piping, and it sits in the middle of the Calumet Region's integrated steel mills, terminals and chemical plants. About three hundred miles south, a much smaller refinery at Mount Vernon processes Illinois Basin crude beside an engineering-plastics plant on the Ohio River. Between the two lie pharmaceutical and specialty chemical plants around Indianapolis and Lafayette, ethanol and soybean plants across the corn belt, and gas-fired power. Indiana is also the only one of its neighbours with its own state OSHA plan for private employers, and in autumn 2026 it took over radioactive-materials licensing from the NRC. This page sets out where API 570 piping is in Indiana, how the code frames inspection, which NDE methods fit, which state and federal agencies matter, and what Atlantis hands your AI. Ready to scope? Request an NDE scope for your AI's plan.

Where API 570 piping is in Indiana

Direct answer: Indiana's in-scope process piping clusters in Lake County (the Whiting refinery and the East Chicago, Hammond and Gary industrial shoreline), the Mount Vernon and Evansville area on the Ohio River, the Indianapolis and Lafayette pharmaceutical and chemical belt, and ethanol, oilseed and power plants spread across central and northern Indiana.

Whiting, East Chicago and Hammond

BP's Whiting refinery is the largest refinery in the Midwest and one of the largest in the country. It was rebuilt in the early 2010s with a new coker and expanded hydroprocessing to run heavy Canadian crude, which means its piping programme carries the full heavy-sour list: sulfidation in hot crude, vacuum and coker piping, erosion in coker and slurry lines, ammonium bisulfide and chloride corrosion in reactor effluent and overhead systems, wet H2S damage in sour water and amine circuits, and hydrogen service in hydroprocessing. A refinery this size has thousands of circuits and many thousands of CMLs, so consistency of CML identification and reading pattern between surveys matters as much as the measurements themselves. Products terminals and pipeline stations in Whiting, East Chicago and Hammond add transfer headers, manifold piping and dock lines.

The steel shoreline: Gary, Burns Harbor and East Chicago

Integrated steel mills at Gary, Burns Harbor and East Chicago run coke plants or receive coke, operate blast furnaces and handle large volumes of fuel gases. Their by-product and gas-handling piping, which carries coke-oven gas, blast-furnace gas, ammonia liquor, tar and light oil, is not refinery piping, and API 570 lists some of these services as optional. Many owners nevertheless apply API 570 principles to flammable and toxic gas mains and by-product piping because the damage mechanisms (ammonium chloride fouling and corrosion, under-deposit attack, wet sour gas, erosion) look familiar to any refinery inspector. Whether a given system is in the API 570 programme is the owner's call; we work to whichever plan the AI sets.

Mount Vernon, Evansville and the Ohio River

CountryMark's refinery at Mount Vernon in Posey County processes crude produced in the Illinois Basin, much of it gathered from Indiana and Illinois fields. It is a mid-sized refinery with lean inspection staffing, where organised CML data and clear isometrics save the AI time. A large engineering-plastics plant at Mount Vernon and chemical, aluminium and power plants along the river around Evansville add chemical-service and utility piping. Ohio River high water affects soil-to-air piping, low-lying pipe racks and outage timing in the spring.

Indianapolis, Lafayette and central Indiana

Pharmaceutical manufacturing, specialty and agricultural chemical plants, and corn and soybean processors in Indianapolis, Lafayette and smaller cities carry ASME B31.3 piping, much of it stainless or high-alloy. Here API 570 is usually applied selectively: flammable solvents, ammonia, chlorine, caustic and acids in the programme; clean utilities managed by simpler plant procedures. Pitting, chloride stress corrosion cracking under insulation on austenitic stainless and crevice attack at welds drive method selection more than general thinning.

Ethanol, oilseed and power plants

Ethanol plants across the north and centre of the state handle ethanol, denaturant and CO2; soybean plants use hexane extraction; and gas-fired power plants carry fuel-gas piping governed by B31.1 or B31.3 at construction. Owners who adopt API 570 for the flammable services typically assign them Class 2 or Class 3 and focus CMLs on mix points, condensate drains and the CUI-prone sections of insulated lines.

How API 570 frames in-service piping inspection

Direct answer: API 570 tells owners to group piping into circuits, rank each by how bad a leak would be (service class), place thickness CMLs where damage is expected, and inspect at intervals set by class and calculated remaining life, unless an RBI programme meeting the code's conditions sets them. It also governs repairs, alterations, rerating and relief devices. The owner's AI makes the evaluations.

The edition in force is API 570, fifth edition, February 2024, issued together with a new edition of API RP 574 on piping inspection practices. According to API, the fifth edition introduces an Inspection Supervisor role, tightens requirements for pressure-relieving devices and adds rules on deferring repair recommendations. Work from a licensed copy; free copies found online are typically superseded editions. Summarised in our own words:

• Roles. The owner-user is responsible for the programme. The authorized piping inspector (the "inspector" in the code) plans, evaluates and signs; examiners perform NDE under the inspector's direction; piping engineers handle design-related decisions; repair organisations do the work.
• Services. Hydrocarbons, chemicals and other flammable or toxic fluids are in scope. Utility services such as water, steam, condensate and low-hazard fluids are optional, which is why steel-mill, pharmaceutical and agricultural owners in Indiana draw the scope line differently from Whiting.
• Classes. Class 1 is for services where a release could quickly become an emergency; Class 2 covers most unit piping; Class 3 covers flammable services with little vaporisation and many off-site lines; later editions add Class 4 for services the owner judges low-consequence.
• Thickness and external intervals. The thickness interval is the shorter of half the remaining life and the class maximum in the code's table; external visual intervals are set by class. Secondary sources report the current maximums as five years for Class 1 (thickness and external), ten and five for Class 2, and ten and ten for Class 3, matching the 1998 edition for Classes 1 to 3. Confirm against the current edition before setting dates.
• Special locations. Injection points, deadlegs, soil-to-air interfaces, small-bore and auxiliary piping and insulated systems prone to CUI get specific attention.
• Corrosion rates. Calculated from CML readings over time; the governing rate is normally the higher of the long-term and short-term rates, at the AI's judgement.

Atlantis calculates rates and remaining life from its own data for the AI's review; the interval decision belongs to the AI and owner. Further reading: API 570 code requirements, what triggers an internal piping inspection and API 510 vs API 570.

Indiana damage mechanisms that drive the plan

Direct answer: At Whiting, heavy-crude mechanisms lead: sulfidation, erosion and ammonium salt corrosion. On the steel shoreline, under-deposit and ammonium chloride attack in gas and by-product piping matter most. Statewide, lake-effect snow and freeze-thaw make CUI and freeze damage a core part of every Indiana plan.

Sulfidation on hot lines. Carbon steel components with low silicon content can corrode far faster than adjacent pipe in the same hot circuit. Owner programmes guided by API RP 939-C commonly require component-level thickness coverage and material verification on susceptible circuits. We collect readings component by component, in the order the AI's isometric specifies, so the fast components stand out.

Ammonium salts and injection points. Wash-water injection upstream of reactor effluent air coolers and overhead condensers creates the classic injection-point problem the code singles out. Automated corrosion mapping over the injection-point circuit, extending downstream past the first change of direction, gives the AI a picture spot readings cannot.

Steel-mill gas and by-product piping. Deposits and condensate in large-diameter gas mains, ammonia liquor and tar lines produce localised under-deposit attack. Profile RT on smaller lines, corrosion mapping at low points and drains, and guided-wave screening of long runs are the usual tools.

CUI and freeze. Northwest Indiana gets lake-effect snow, and the whole state sees freeze-thaw cycles. Snowmelt finds every gap in jacketing, and intermittently traced lines spend long periods in the CUI temperature range. Austenitic stainless piping in pharmaceutical and chemical plants adds the risk of external chloride stress corrosion cracking under wet insulation, which calls for PT after stripping rather than thickness checks alone.

NDE methods for API 570 work in Indiana

Direct answer: UT at CMLs is the backbone, with component-level coverage on Whiting's sulfidation circuits. Corrosion mapping handles injection points and under-deposit attack, profile RT covers small-bore and insulated lines, guided wave screens long runs, PAUT or TOFD sizes weld flaws, and PT finds chloride cracking on stainless.

For radiography: Indiana signed its agreement with the NRC in late September 2026 and became the 41st Agreement State, effective 1 October 2026, with radioactive-materials licensing (including industrial radiography sources) moving from the NRC to the Indiana Department of Homeland Security's radioactive materials programme. Licences and reciprocity arrangements are in transition, so confirm the current licensing authority with the state before planning RT. RT is always performed by crews properly licensed for work in Indiana. Methods are selected from the circuit's damage mechanisms; see our API 571 damage mechanisms guide.

How Atlantis supports your Authorized Inspector

Direct answer: We supply the examinations, not the evaluation. An ASNT NDT Level III reviews procedures, ASNT SNT-TC-1A certified technicians perform the work, the data is checked against history on site, and the AI receives a digital report by circuit and CML. We are not an Authorized Inspection Agency and we do not supply API-certified inspectors.

The workflow runs from the AI's plan to the AI's signature. First, the AI or the owner's inspection group gives us the circuits, isometrics with CMLs, damage mechanisms and coverage required. Our Level III prepares or reviews each technique against the owner's specification, including hot-surface UT limits and cold-weather practice. Crews are mobilised to your site on a schedule agreed during scoping. Before demobilising, readings are compared with the last survey, and any unexplained jump, missing CML or access problem is re-shot or documented. The report, delivered in our digital reporting platform, holds readings, C-scans, RT images, guided-wave results with follow-up, calibration and instrument records and technician certifications. The AI evaluates rates and remaining life, sets the next dates, decides on repairs and signs. Next time, the same identifiers and patterns carry forward.

Keeping the NDE separate from the evaluation gives the AI independent, traceable data. RBI programmes and fitness-for-service assessments are performed by the owner's engineers or a specialist using that data; Atlantis does not offer them. See API 570 piping NDE support and piping circuit and CML inspection.

Indiana regulations that sit on top of API 570

Direct answer: Indiana does not set piping inspection intervals in statute. Process safety for private employers is enforced by IOSHA, Indiana's state OSHA plan, under rules equivalent to 29 CFR 1910.119. The Indiana Utility Regulatory Commission's Pipeline Safety Division covers intrastate gas and hazardous-liquid pipelines; PHMSA covers interstate lines. Confirm current requirements with each agency.

IOSHA and process safety management. Indiana operates its own occupational safety and health plan, IOSHA, within the Indiana Department of Labor, covering private-sector as well as public employers. IOSHA enforces process safety management requirements equivalent to the federal standard, so the mechanical integrity element applies to piping systems in covered processes: written procedures, inspection and testing that follow recognised and generally accepted good engineering practice, frequencies consistent with that practice and with operating experience, documentation of each inspection, and correction of deficiencies. API 570 is the practice Indiana refineries and chemical plants cite for piping. EPA's Risk Management Program (40 CFR Part 68) adds a parallel federal requirement for Program 3 processes.

IURC Pipeline Safety Division and PHMSA. Under Indiana Code chapter 8-1-22.5 and a PHMSA certification, the IURC's Pipeline Safety Division inspects and enforces safety rules for intrastate natural gas pipelines and, since legislation in 2006, intrastate hazardous-liquid and carbon dioxide pipelines; PHMSA regulates interstate systems directly. The federal hazardous-liquid rule (49 CFR Part 195) excludes in-plant piping at refineries, manufacturing plants and storage facilities, and certain terminal transfer piping, so Whiting's unit piping is API 570 and PSM territory while the crude and products pipelines that serve it follow Part 195. The operator documents where the boundary falls, typically around launchers, receivers, meter stations and block valves; we keep plant and pipeline datasets separate. Pipeline-side NDE is described on our pipeline inspection page.

Boiler and pressure vessel rules. The Indiana Department of Homeland Security's boiler and pressure vessel programme (675 IAC 30) covers boilers and unfired pressure vessels, not process piping. Vessel permit inspections often share outage windows with piping work, so we plan them together where the owner wants.

IDEM. Air permits and leak detection programmes at Whiting and the Calumet mills do not set API 570 intervals, but their findings often feed the AI's piping worklist.

Planning around turnarounds, mill outages and Indiana weather

Direct answer: Use spring to autumn for on-stream surveys and insulation stripping, save outage time for work that needs lines open, and book early: Whiting, the Chicago-area refineries and Robinson draw on the same regional labour pool, and steel-mill outages follow the mill's production calendar.

• Whiting turnarounds: large outages with many repair and tie-in welds; plan PAUT, TOFD and profile RT capacity from the start, and run on-stream CML and injection-point mapping beforehand so replacement spools are ordered in time.
• Steel-mill outages: short, production-driven windows; gas-main and by-product piping inspection is often done on-stream with guided wave, mapping and profile RT so the outage is kept for repairs.
• Mount Vernon and the Ohio River: spring high water can limit access to low-lying piping; schedule soil-to-air and rack work around it.
• Winter: cold-weather UT is practical with suitable couplant and temperature correction on dry, ice-free surfaces; insulation removal is better left for milder months where the AI allows.

API 570 piping inspection support across Indiana

Direct answer: Atlantis supports API 570 programmes from the Lake Michigan shoreline to Indianapolis and the Ohio River. Crews are mobilised to your site and the schedule is agreed during scoping.

• Indianapolis and central Indiana: piping inspection in Indianapolis, corrosion inspection in Indianapolis and third-party inspection in Indianapolis, for pharmaceutical, chemical and manufacturing piping.
• Whiting, East Chicago, Hammond and Gary: refinery, terminal and steel-mill piping; send the site address with your circuit list.
• Mount Vernon and Evansville: refinery, plastics and river-industry piping.
• Lafayette and the corn belt: chemical, ethanol and oilseed plants.

Other equipment on the same sites: pressure vessel inspection in Indianapolis and tank inspection in Indianapolis. Sibling hubs: API 510 pressure vessel inspection in Indiana, API 653 tank inspection in Indiana and NDT inspection services in Indiana. For NDE skills, see ASNT NDT training in Indiana.

Data that stays useful between surveys

Direct answer: A large programme like Whiting's, or a lean one like a mid-sized refinery's, depends on comparable readings year to year. We keep your circuit and CML identifiers, record pattern, instrument and calibration for each reading, and deliver files that load into your database.

Where previous contractors used different CML names or measurement patterns, we flag the mismatch instead of forcing a rate the AI cannot trust. New CMLs are photographed and described. Results can be shown in a digital twin of the unit, and certifications, calibrations and work orders can be tracked in our inspection-management ERP. Report layouts are on NDT report templates; construction-code context is in ASME B31.3 explained.

What to send us for an Indiana quote

Direct answer: Circuits and isometrics, the last API 570 report, the AI's plan, access and insulation details, and your dates. We reply with questions or a scope, and a quote within 24 hours of having what we need.

1. Circuit list with service class, material, size, schedule and operating conditions.
2. Isometrics showing CMLs, injection points, deadlegs, small-bore connections and insulated or traced sections.
3. Previous API 570 report and thickness history, or confirmation that this is a baseline.
4. The AI's inspection plan and damage mechanisms of concern.
5. Access, scaffolding, insulation and temperature constraints, and any mill or refinery site rules.
6. Target dates, turnaround or outage windows.

Send us your circuit list for a scope and quote.

Frequently asked questions: API 570 in Indiana

Who can perform API 570 piping inspection in Indiana?

An API 570 Authorized Piping Inspector working for the owner or an inspection agency directs and signs the inspection; qualified examiners perform the NDE. Atlantis performs that NDE and delivers the results to your AI, who remains inspector of record.

Does Indiana law require API 570?

Not by name. IOSHA enforces process safety management requirements equivalent to 29 CFR 1910.119, whose mechanical integrity element requires piping inspection that follows recognised good engineering practice. API 570 is the practice most Indiana refineries and chemical plants adopt.

Is IOSHA or federal OSHA responsible for Indiana refineries?

IOSHA, Indiana's state plan within the Indiana Department of Labor, covers private-sector workplaces including refineries and chemical plants, with federal OSHA monitoring the plan.

How often should Class 1 piping be inspected?

At the shorter of half the remaining life or the class maximum for thickness, and the class interval for external visual, unless a qualifying RBI programme sets the intervals. The 1998 edition gave five years for both; check the current edition with your AI.

Who regulates pipelines in Indiana?

The IURC Pipeline Safety Division covers intrastate natural gas and hazardous-liquid pipelines under PHMSA certification; PHMSA covers interstate lines. In-plant refinery piping is excluded from the federal hazardous-liquid pipeline rule and stays under API 570 and PSM.

Is steel-mill gas piping covered by API 570?

API 570 lets owners choose whether some services are in scope. Many mills apply its principles to flammable and toxic gas and by-product piping; the decision and the plan are the owner's and AI's, and we work to that plan.

Is Atlantis an Authorized Inspector?

No. We are not an Authorized Inspection Agency and we do not supply API-certified inspectors. We supply independent NDE data to the AI who evaluates and signs.

Who licenses industrial radiography in Indiana now?

Indiana became an NRC Agreement State effective 1 October 2026, and radioactive-materials licensing is moving to the Indiana Department of Homeland Security. Confirm the current licensing authority with the state before planning RT.

What certifications do your technicians hold?

ASNT SNT-TC-1A certification under our written practice, with ASNT NDT Level III oversight; certificates and calibration records come with every report.

Do you offer RBI, fitness-for-service or API 570 certification training?

No. RBI and FFS are performed by the owner's engineers or specialists using our data, and our training covers ASNT SNT-TC-1A only. See the API inspector career guide for the certification route, or ASNT Level III training for NDE skills.

How quickly can you mobilise to Whiting or Mount Vernon?

We quote within 24 hours of receiving the scope information; mobilisation is agreed during scoping around your outage, permits and site access.

Next step

For a turnaround NDE package, an injection-point survey or CMLs coming due, get a quote within 24 hours or book a scoping call. Atlantis performs the NDE; your API 570 Authorized Inspector remains inspector of record and signs the inspection report.

More Atlantis NDT services in Indiana

• NDT training and certification in Indiana
• Level III consulting in Indiana
• NDT inspection services in Indiana
• API 653 storage tank inspection support in Indiana
• API 510 pressure vessel inspection support in Indiana
• Practical NDT simulator in Indiana

Part of the wider piping circuit inspection service at Atlantis NDT.