Company lists · Data refreshed September 2026

Top 25 Gas line safety inspection companies worldwide

RevenueBase identified 393 gas line safety inspection companies worldwide as of September 2026 and tracks 7,571 professional contacts across them, including 1,509 with verified work emails. The United States is the largest market and Rio De Janeiro the largest hub.

This list covers gas line safety inspection companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026. Country and city lists for gas line safety inspection companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review
393Companies
7,571Contacts tracked
1,509Verified emails
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The 25 largest gas line safety inspection companies worldwide

Ranked by team size
Top 25 of 393 gas line safety inspection companies worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to gas line safety inspection companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceMadrid, United KingdomHQ checked Sep 19, 202610001+1,463 contacts →

Partial evidence

“Applus+ is globally recognized across all phases of the oil and gas industry, including upstream, midstream, and downstream, both on land and at sea.”

Source: RevenueBase Database · checked Sep 19, 2026
2Strong evidenceHouston, TX, United StatesHQ checked Sep 19, 20261,001-5,000799 contacts →

Strong evidence

“Since 1933 Heath has led the industry in the safety of natural gas utilities infrastructure through the innovative and conscientious actions of our employees.”

Source: RevenueBase Database · checked Sep 19, 2026
3Partial evidenceBergen, NorwayHQ checked Sep 19, 20265,001-10,000680 contacts →

Partial evidence

“Oceaneering Asset Integrity is one of the largest providers of Integrity and Inspection Services in the world.”

Source: RevenueBase Database · checked Sep 19, 2026
4Strong evidencePasadena, TX, United StatesHQ checked Sep 19, 2026501-1,000226 contacts →

Strong evidence

“The TechCorr name is synonymous with safe, quality inspection services.”

Source: RevenueBase Database · checked Sep 19, 2026
5Partial evidenceLeague City, TX, United StatesHQ checked Sep 19, 2026201-500213 contacts →

Partial evidence

“Pro-Surve Technical Services is an advanced non-destructive testing and inspection company.”

Source: RevenueBase Database · checked Sep 19, 2026
6Indirect evidenceRotterdam Havens, NetherlandsHQ checked Sep 19, 2026n/a178 contacts →

Indirect evidence

“Kwaliteit Gasmeting Nederland BV (KGN) was founded in 2011 to check if containers arriving to the port of Rotterdam contain fumigants/pesticides and -/or production gasses in…”

Source: RevenueBase Database · checked Sep 19, 2026
7Partial evidenceSaint Rose, LA, United StatesHQ checked Sep 19, 2026201-500130 contacts →

Partial evidence

“Since 1978, Coastal Gulf & International, Inc.(CGI) has been a trusted leader in independent inspection, testing, and technical services for the energy, petrochemical, and marine…”

Source: RevenueBase Database · checked Sep 19, 2026
8Indirect evidenceAustin, TX, United StatesHQ checked Sep 19, 2026501-1,000130 contacts →

Indirect evidence

“Welcome to On & Offshore Quality Control Specialists, LLC.”

Source: RevenueBase Database · checked Sep 19, 2026
9Partial evidencePlano, TX, United StatesHQ checked Sep 19, 2026501-1,000119 contacts →

Partial evidence

“The core of TJ Inspection has always included a unique concept that has continued to drive our company into what it is today, an inspection company ran by inspectors.”

Source: RevenueBase Database · checked Sep 19, 2026
10Indirect evidenceIstanbul, TürkiyeHQ checked Sep 19, 202651-20095 contacts →

Indirect evidence

“UGETAM is a company based in Turkey.”

Source: RevenueBase Database · checked Sep 19, 2026
11Strong evidenceFort Worth, TX, United StatesHQ checked Sep 19, 2026201-50094 contacts →

Strong evidence

“3B Inspection was founded in 2016 to provide dependable, high-quality inspection services for the oil and gas pipeline industry.”

Source: RevenueBase Database · checked Sep 19, 2026
12Strong evidenceBelle Chasse, LA, United StatesHQ checked Sep 19, 202611-5083 contacts →

Strong evidence

“Based in Belle Chasse, LA, with a satellite location in Houma, LA, Tailing International, LLC provides 3rd party inspection and construction management to the oil and gas industry.”

Source: RevenueBase Database · checked Sep 19, 2026
13Strong evidenceNew Mexico, TX, United StatesHQ checked Sep 19, 2026201-50066 contacts →

Strong evidence

“Pipeline inspection division of Legacy Safety & Consulting LLC.”

Source: RevenueBase Database · checked Sep 19, 2026
14Indirect evidenceRocky View County, AB, CanadaHQ checked Sep 19, 202651-20046 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 19, 2026
15Strong evidenceValparaiso, IN, United StatesHQ checked Sep 19, 202651-20046 contacts →

Strong evidence

“CATSI is a leading provider of specialized inspection and technical services, primarily serving the oil and gas, pipeline, chemical, metals, and power industries.”

Source: RevenueBase Database · checked Sep 19, 2026
16Strong evidenceArden, NC, United StatesHQ checked Sep 19, 202611-5045 contacts →

Strong evidence

“Evergreen Medical Services provides medical gas systems testing, inspections and equipment as well as environmental-exposure monitoring in hospitals and pharmacies.”

Source: RevenueBase Database · checked Sep 19, 2026
17Indirect evidenceBury St. Edmunds, United KingdomHQ checked Sep 19, 202651-20043 contacts →

Indirect evidence

“The company specialises in being able to provide a bespoke service to the homeowners, landlords, managing agents and the commercial sectors.”

Source: RevenueBase Database · checked Sep 19, 2026
18Indirect evidenceMidland, TX, United StatesHQ checked Sep 19, 202651-20042 contacts →

Indirect evidence

“At J&J Pressure Management we take your high pressure iron business seriously.”

Source: RevenueBase Database · checked Sep 19, 2026
19Indirect evidenceCalgary, AB, CanadaHQ checked Sep 19, 202651-20040 contacts →

Indirect evidence

“Vision Integrity Engineering is a client-focused company able to provide a variety of services.”

Source: RevenueBase Database · checked Sep 19, 2026
20Partial evidenceStirling, United KingdomHQ checked Sep 19, 202651-20036 contacts →

Partial evidence

“SGS Gas Analysis Services: Specialists in Gas Testing, Instrumentation, Validation and Design.”

Source: RevenueBase Database · checked Sep 19, 2026
21Indirect evidenceEdmonton, AB, CanadaHQ checked Sep 19, 202651-20035 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 19, 2026
22Strong evidenceStockon-on-tees, United KingdomHQ checked Sep 19, 202651-20033 contacts →

Strong evidence

“R&A Kay Inspection Services Ltd.(rak), based in the North East, is a leading inspection services company catering for the onshore oil & gas, petrochemical, industrial gasses…”

Source: RevenueBase Database · checked Sep 19, 2026
23Partial evidenceSan Diego, CA, United StatesHQ checked Sep 19, 202651-20033 contacts →

Partial evidence

“Our mission is to provide the highest industry standards through quality inspection & testing.”

Source: RevenueBase Database · checked Sep 19, 2026
24Partial evidenceDepartamento Escalante, ArgentinaHQ checked Sep 19, 202651-20032 contacts →

Partial evidence

“Our activity covers the area of non-destructive testing and inspection in the construction and assembly sectors.”

Source: RevenueBase Database · checked Sep 19, 2026
25Partial evidenceKemah, TX, United StatesHQ checked Sep 19, 202611-5025 contacts →

Partial evidence

“Since 1985, in locations throughout the world, Alpha Pipeline Integrity Services (hereafter referred to as Alpha), has been providing services like tracer gas leak detection for…”

Source: RevenueBase Database · checked Sep 19, 2026

Showing 25 of 393 gas line safety inspection companies worldwide

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Gas line safety inspection companies worldwide at a glance

As of Sep 19, 2026
19.9%Verified-email coverage
19.3Average contacts per company
11-50Median size (employees)
1.8%Largest-city concentration · Rio De Janeiro
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
183
11-50
124
51-200
51
201-500
17
501-1,000
8
1,001-5,000
3
5,001-10,000
1
10001+
1

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among gas line safety inspection companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage
Every country. Country and city lists for gas line safety inspection companies are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “gas line safety inspection companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names gas line safety inspection companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among gas line safety inspection companies, and records with no verified work email.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 1,509 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Gas line safety inspection companies by location

2 lists · largest first

Every Gas line safety inspection companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names gas line safety inspection companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many gas line safety inspection companies are there worldwide?

RevenueBase identified 393 gas line safety inspection companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Applus OIL And GAS, headquartered in Madrid, tops this list with the largest team on record.

Which country has the most gas line safety inspection companies?

The United States leads with 92 companies, followed by Brazil (53). Every gas line safety inspection companies list by country and city is linked on this page.

Which city has the most gas line safety inspection companies?

Rio De Janeiro leads with 7 headquartered companies, followed by Calgary (5) and Houston (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,509 verified decision-maker contacts tracked across these 393 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.