National Industrial Maintenance

What National Industrial Maintenance does

National Industrial Maintenance, Inc. (NIM-IN) is an environmental infrastructure maintenance services provider headquartered in East Chicago, Indiana. The company delivers a broad portfolio of inspection, cleaning, excavation, and emergency response services to municipalities, utilities, industrial firms, and engineering firms across the United States. Its service catalog spans three categories: Sewer Services (sewer cleaning, chemical cleaning, digital TV inspection, dry ice blast cleaning, explosion-proof TV inspection, hydro blasting, ground-penetrating radar, boiler cleaning, non-hazardous waste transportation, 24-hour emergency spill response, sonar pipeline inspection, and vacuum/hydro excavation), Sediment Services (sludge dewatering, tank cleaning, and wet/dry vacuum cleaning), and Special Services (infectious disease decontamination and asphalt crack sealing). The company is a wholly-owned subsidiary of Carylon Corporation, a Chicago-based ESOP-owned diversified group whose 14 sister operating companies provide additional equipment, crews, and geographic reach, allowing NIM-IN to project a 50-state service capability from a single East Chicago facility.

The company's technical stack is built around custom-designed specialized equipment rather than software: high-capacity wet/dry vacuum vehicles (3,200–7,500 cfm, 18–27 in. Hg), Class 1 Div 1 Group C&D and ATEX Zone 1&2-rated explosion-proof CCTV inspection crawlers with WinCam data-collection software, high-pressure hydro blasting rigs up to 20,000 psi paired with an in-house micron-filtration system that reuses up to 80% of wastewater, high-resolution sonar pipeline profiling (10"–120" diameter), proprietary dry ice blast cleaning, pneumatic/hydro excavation recognized for use within 5 feet of utility hotline buffer zones, and the Halosil HaloMist/HaloFogger dry-mist disinfection platform. The business model is project-based professional services revenue, with bid-based pricing for municipal engagements and quote-based pricing for utilities and industrial customers, supplemented by recurring managed maintenance contracts and incident-based 24/7/365 emergency spill response. Distribution is direct enterprise field sales supported by trade show presence (WEFTEC, No-Dig Show) and content marketing (case studies, brochures), with national reach delivered through coordinated crew deployment with Carylon sister companies.

NIM-IN is staffed at 51–100 employees and holds material regulatory credentials that function as competitive moats: US Coast Guard OSRO certification (#158), TWIC cardholders, ISNetworld/PICS/WJTA membership, NASSCO PACP coding, NCCER/OSHA/API/OQ-trained field personnel, and DOT MC-312 tanker certification. Notable customers include ArcelorMittal (steel), Lake County Government Center (municipal), Prime, Tack & Seal Company (asphalt), CrossFit Crown Point (commercial disinfection), and unnamed refiners, construction firms, and trucking operators across the Midwest, Pacific Northwest, and beyond. The company has no disclosed revenue, no external funding, and operates as a private subsidiary whose financials are consolidated within Carylon Corporation.

Name

National Industrial Maintenance

Legal name

National Industrial Maintenance, Inc.

Website

https://nimin.com

Company type

Private

Founded year

1970

Operating status

Operating

Headcount range

51–100 employees

Short description

National Industrial Maintenance, an East Chicago, Indiana-based wholly-owned subsidiary of Carylon Corporation, provides environmental infrastructure inspection, cleaning, excavation, and 24/7 emergency spill response services to municipalities, utilities, and industrial firms across the U.S.

Ownership category

akta.pro rank

Product category

Industrial Environmental Maintenance Services

NAICS

Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance (8113), Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance (81131), Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance (811310)

SIC

Special Industry Machinery (No Metalworking Machinery) (3550), Misc Industrial & Commercial Machinery & Equipment (3590), Specialty Cleaning, Polishing And Sanitation Preparations (2842)

akta.pro primary industry

Industrial Cleaning & Decontamination (Tank/Vessel/Confined Space) (IMAIAGAE)

akta.pro secondary industry

Spill Response & Emergency Environmental Services (Oil/Chemical) (IMAIAGAD)

Keywords

• Environmental infrastructure maintenance
• Industrial cleaning services
• Sewer pipeline inspection
• Hydro blasting vacuum excavation
• Emergency spill response

Headquarters

HQ city

East Chicago

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Industrial & Environmental Cleaning Services: Project-based professional services revenue from sewer cleaning, hydro blasting, chemical cleaning, dry ice blast cleaning, tank cleaning, sludge dewatering, wet/dry vacuum cleaning, and boiler cleaning engagements; priced per project and scoped based on equipment, crew size, and duration.
2. Infrastructure Inspection Services: Fee-for-service revenue from digital TV inspection, explosion-proof TV inspection, sonar pipeline inspection and ground-penetrating radar work for municipalities, utilities, industrial firms and engineering firms.
3. 24-Hour Emergency Spill Response: Emergency response and cleanup services billed per incident for oil and chemical spills, marine/road/rail incidents, pipeline releases, industrial fixed facility incidents and natural disasters; available 24/7/365 with crew deployment within one hour from East Chicago, IN.
4. Managed Maintenance Contracts for Municipalities: Recurring maintenance engagements with cities and towns (e.g., sewer cleaning, hydro excavation, tank cleaning) typically contracted via a formal municipal bidding process; ongoing relationships noted across Chicagoland.
5. Oil Tank & Refinery Maintenance Services: Specialized tank cleaning services (e.g., APT 652 Inspection preparation, product changes, seal and pontoon inspections, IFR removal) for refiners, often performed as multi-site national projects with multi-week mobilizations.
6. Non-Hazardous Waste Transportation & Removal: Transportation and disposal services for liquid, semi-liquid and semi-solid wastes hauled in DOT Specification MC-312 tankers, vacuum tankers with hydraulic rear-door discharge, and dry-material dump trucks/roll-off containers.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels6 records

Core offering

National Industrial Maintenance provides a full line of environmental infrastructure inspection, maintenance, and cleaning services including sewer cleaning, chemical cleaning, hydro blasting, dry ice blast cleaning, digital and explosion-proof TV inspection, hydro/vacuum excavation, tank cleaning, sludge dewatering, boiler cleaning, non-hazardous waste transportation, and 24/7 emergency spill response. The company deploys trained field crews and custom-designed specialized equipment from its East Chicago, IN base to serve municipalities, utilities, industrial firms, and engineering firms across all 50 states, with national reach through the Carylon Corporation network.

Product overview

National Industrial Maintenance (Indiana), headquartered in East Chicago, Indiana, is a wholly owned subsidiary of the Carylon Corporation and offers a comprehensive single-vendor portfolio of environmental infrastructure inspection, maintenance, and cleaning services organized into three core categories: Sewer Services (Sewer Cleaning, Chemical Cleaning, Digital TV Inspection, Dry Ice Blast Cleaning, Explosion-Proof TV Inspection, Hydro Blasting, Ground-Penetrating Radar Services, Boiler Cleaning, Non-Hazardous Waste Transportation & Removal, 24-Hour Emergency Spill Response, Sonar Pipeline Inspection, and Vacuum/Hydro Excavation), Sediment Services (Sludge Dewatering, Tank Cleaning, and Wet/Dry Vacuum Cleaning), and Special Services (Infectious Disease Cleaning/Decontamination & Sanitization Services and Asphalt Crack Sealing). The Industrial Services Group offering bundles these capabilities with proprietary technologies (robotic dry ice blasting, explosion-proof TV inspection, ground penetrating radar, spincast cement pipe rehabilitation, no entry tank cleaning, and high pressure line cleaning) and is delivered together with other Carylon operating companies to serve municipalities, utilities, industrial companies, and engineering firms across all 50 states.

Differentiator

Problem solved

Functional benefit

Products and services

• Sewer Cleaning Sewer line cleaning service using high-velocity jetting (up to 165 gpm at 2,500 psi) and power bucketing with machine-driven buckets and scrapers to remove blockages caused by sewage backups, landslides, mudflows, or floods; serves municipalities and utilities.
• Chemical Cleaning Circulation of custom-blended chemical formulations under controlled conditions to remove heat-transfer-robbing deposits from heat exchangers, condensers, boilers, and towers in refining, chemical processing, electric utility, food-grade, and pulp and paper mills.
• Digital TV Inspection CCTV-based sewer inspection service using the latest equipment and NASSCO PACP coding and grading standards to locate trouble spots such as cracked/broken tiles, offset joints, and blockages without excavation; serves utilities and municipalities.
• Dry Ice Blast Cleaning Non-destructive cleaning using dry ice pellets whose kinetic energy and thermal effect lift contaminants without leaving secondary waste since dry ice sublimates upon impact; safe for production equipment and food and drug processing facilities.
• Explosion-Proof TV Inspection Video inspection for pipelines and confined spaces in explosive atmospheres (Class 1, Division 1, Group C & D; ATEX Zone 1 and 2), using flame path technology, inert gas pressurization, explosion-proof camera tractors, pan and tilt cameras, deep tunnel cameras, mini-cameras, and WinCam software.
• Hydro Blasting High-pressure water blasting at up to 20,000 psi and 7 to 40 gpm to cut through stubborn scales and product build-up in boiler and heat exchanger tubes and remove paint, dirt, and rust from structures, machinery, and equipment; includes in-house micron-filtration to capture, filter, and reuse wastewater, reducing water usage by up to 80 percent.
• Ground-Penetrating Radar Services Non-destructive subsurface imaging using radar pulses to detect buried objects, changes in material properties, and locate non-conductive utilities and abandoned structures; serves engineering firms, utilities, and municipalities.
• Boiler Cleaning Comprehensive boiler system maintenance using high-pressure and high-volume water pump units (10k, 20k, or 40k) for coal/fossil fuel, steam electric, combustion turbine, and combined cycle boilers, including high-pressure water blasting, air heater/pre-heater cleaning, online boiler deslag solutions, and boiler striping solutions.
• Non-Hazardous Waste Transportation & Removal Safe and efficient transportation and disposal service for liquid, semi-liquid, and semi-solid wastes, using DOT Specification MC-312 tankers, vacuum tankers with hydraulic shakers for sludge, and dump trucks, dump trailers, or 25-yard roll-off containers for dry materials.
• 24-Hour Emergency Spill Response Around-the-clock (24/7/365) oil and chemical spill response and cleanup for inland marine hazardous material and oil spills, industrial fixed facility incidents, railroad/trucking/marine incidents, pipeline releases, and natural disasters, with OSHA-trained personnel and US Coast Guard-approved OSRO certified spill responder standards.
• Sonar Pipeline Inspection High-resolution sonar-based inspection of surcharged pipelines, siphons, river crossings, and force mains in diameters from 10 to 120 inches, using skid, float, or robotic tractor-mounted scanners with internal pitch and roll sensors, eliminating the need for bypass pumping.
• Vacuum/Hydro Excavation Non-destructive excavation using high-pressure water combined with vacuum (or low-pressure Hydro-Vac) to safely dig into soil without disturbing surrounding pipes, recognized by regulatory authorities as non-mechanical excavation allowing work within 5 feet of hotline buffer zone boundaries.
• Sludge Dewatering Removal and dewatering of sludge-contaminated sediment or oily wastes from pits, ponds, lagoons, industrial tanks, and digesters using recessed chamber filter presses to substantially reduce volume and corresponding disposal costs.
• Tank Cleaning Oil tank cleaning from crude oil to refined products using high-volume, low-pressure water with approximately 50-foot reach capabilities, a unique micron-filtration system for water reuse, and certified personnel performing both entry and non-entry mechanical cleaning methods.
• Wet/Dry Vacuum Cleaning Custom-designed vacuum truck service operating at 3,200 to 7,500 cfm and 18 to 27 inches of Mercury to remove metal chips, slag, steel shot, wood chips, sawdust, grain, mill scale, slurries, sludge, and water without stirring up dust, with optional HEPA filter and remote cyclone units for vessel discharge.
• Decontamination & Sanitization Services Infectious disease cleaning, disinfecting, and abatement service using a proprietary dry mist aerosol fog (hydrogen peroxide and ionic silver) along with CDC-approved specialized cleaning techniques to clean offices, airplane hangars, vehicles, and other complex facilities.
• Asphalt Crack Sealing Pavement preservation treatment involving crack sealing and sealcoating of roads and pavements to extend pavement service life, reduce pothole formation, and maximize road investment returns.
• Carylon Industrial Services Group Multi-company Carylon service group using proprietary cleaning technologies for maintenance and outage-related activities, including robotic dry ice blasting/cleaning, pneumatic/hydro excavation, explosion-proof television inspection, ground penetrating radar, spincast cement pipe rehabilitation, no entry tank cleaning, and high pressure line cleaning.

Quantifiable outcome

• Cleans one asphalt truck per day for Prime, Tack & Seal Company vs. previously one week per truck; cleans 13 trucks bi-annually.
• +4 more outcomes

Named customers8 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature11 records

Scale indicators11 records

Broad incumbents

• Clean Harbors: Largest publicly traded North American environmental services company offering industrial cleaning, emergency spill response, waste disposal and field services — a much broader incumbent that overlaps with nearly every NIM-IN service line.
• Team Industrial Services: Provider of specialty industrial services to the power, refining and petrochemical markets including mechanical cleaning, inspection and NDE — overlaps with NIM-IN's refining and power-plant work.
• Stericycle: National regulated waste and disinfection services provider; overlaps with NIM-IN's waste transportation and infectious-disease cleaning capabilities, particularly post-COVID.
• US Ecology: National provider of environmental services including industrial waste management, emergency response and field services — a broader incumbent with comparable industrial and emergency-response capabilities.

Direct peers

• Video Industrial Services: Alabama-based Carylon sister company focused on CCTV sewer inspection, hydro excavation and industrial cleaning for utilities and municipalities in the Southeast U.S.
• Mobile Dredging & Video Pipe: Pennsylvania-based Carylon sister company specializing in sewer cleaning, TV inspection, dredging and vacuum/hydro excavation — overlapping core municipal services with NIM-IN.
• HydroChemPSC: Industrial cleaning specialist serving refineries, chemical plants and power generators with hydro blasting, chemical cleaning and vacuum services — directly comparable to NIM-IN's industrial segment.
• Deep South Industrial Services: Carylon sister company based in Georgia offering industrial cleaning, hydro blasting, vacuum services and emergency spill response with overlapping service mix and customer base to NIM-IN.
• Specialized Maintenance Services: Texas-based Carylon sister company delivering industrial cleaning, hydro blasting, chemical cleaning and tank services to refineries and petrochemical customers in the Gulf Coast region.
• Metropolitan Environmental Services: Ohio-based Carylon sister company providing industrial cleaning, tank cleaning, hydro excavation and hazardous waste transport — a directly comparable operating-company peer inside the same parent platform.

Market position

Strengths5 records

Weaknesses5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UChFJR5twuS3fyP6l0RXHaJw/featured
• Facebookfacebook.com/NIMINC
• LinkedInlinkedin.com/company/national-industrial-maintenance

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about National Industrial Maintenance