Company lists · Data refreshed September 2026

Top 18 Refinery maintenance contractors based in Spain

Name: Refinery maintenance contractors based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 99 companies tracked

RevenueBase identified 99 company matches for refinery maintenance contractors associated with Spain as of September 2026 and tracks 2,003 professional contacts across them, including 114 with verified work emails. Madrid is the largest hub.

This list covers company matches for refinery maintenance contractors associated with Spain, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 17, 2026 How this list was built

99Companies

2,003Contacts tracked

114Verified emails

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The 18 largest refinery maintenance contractors based in Spain

Ranked by team size

Top 18 of 99 company matches for refinery maintenance contractors based in Spain, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Grupo Masa	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	1,001-5,000	450 contacts →
	Exact match “MASA interviene en toda la cadena de actividades en la vida de las instalaciones e infraestructuras, desde su fase de proyecto, hasta la construcción y montaje de la instalación…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Moncobra	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	501-1,000	292 contacts →
	Exact match “Empresa de referencia del Grupo Cobra especializada en diseño, ingeniería, instalaciones y montajes mecánicos y eléctricos y mantenimiento industrial.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Siemsa	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	501-1,000	246 contacts →
	Exact match “Siemsa es un operador independiente que proporciona servicios para el sector de la Energía, Industria y Oil and Gas, sistemas de control y analizadores de proceso, así como…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Serprotech Energy	Exact match	Valencia/valència, SpainHQ recorded Sep 17, 2026	51-200	107 contacts →
	Exact match “Somos una empresa de servicios dedicada a ofrecer soluciones en el área de: SERVICIO ESPECIALIZADO DE PERSONAL SERVICIOS DE CAMPO Evaluación, Inspección y Mantenimiento de…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	ATM España	Exact match	Gijón, SpainHQ recorded Sep 17, 2026	201-500	65 contacts →
	Exact match “Asistencia Total en Mantenimiento España S.L.U.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Therman	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	51-200	58 contacts →
	Exact match “THERMAN Mantenimiento Industrial, S.L.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Opex Energy	Exact match	Barcelona, SpainHQ recorded Sep 17, 2026	11-50	44 contacts →
	Exact match “Opex Energy is an engineering and technical assistance company.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Sintemar	Exact match	Erandio, SpainHQ recorded Sep 17, 2026	11-50	37 contacts →
	Exact match “SINTEMAR is a company specialized in technical solutions for the installation, protection, repair and reliability of industrial and marine assets, with over 65 years of experience…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Tuberias Y Montajes Orgaz SL	Exact match	Alcala De Guadaira, SpainHQ recorded Sep 17, 2026	11-50	14 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Umaco Mantenimientos Industriales	Exact match	Huelva, SpainHQ recorded Sep 17, 2026	11-50	12 contacts →
	Exact match “Empresa dedicada al mantenimiento de instalaciones industriales, entro los trabajos que realizamos destacamos- Servicios y mantenimiento electromecánico (Ajustes y servicios…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Fort Instalaciones Petroleras SL	Exact match	Parets, SpainHQ recorded Sep 17, 2026	51-200	11 contacts →
	Exact match “La experiencia familiar de más de 30 años en el sector de las instalaciones petroleras, nos llevó a crear en 1998 Fort Instalaciones Petroleras, una empresa de servicios en el…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Hidramar International	Exact match	Santa Cruz De Tenerife, SpainHQ recorded Sep 17, 2026	11-50	11 contacts →
	Exact match “At Hidramar International we help to avoid downtimes to our clients providing cost-effective and safe high-quality assets maintenance in the Atlantic Ocean while they keep…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Gasdruck Technical Innovation	Exact match	Cardedeu, SpainHQ recorded Sep 17, 2026	11-50	8 contacts →
	Exact match “GASDRUCK es la marca comercial de TECHNICAL INNOVATION PIPING S.L, es una empresa de servicios dedicada al montaje de instalaciones industriales y especializada en la fabricación…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	ANMAR	Exact match	Rubí, SpainHQ recorded Sep 17, 2026	11-50	7 contacts →
	Exact match “En ANMAR llevamos más de cuatro décadas resolviendo retos mecánicos para la industria.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Globergy	Exact match	Cervelló, SpainHQ recorded Sep 17, 2026	11-50	5 contacts →
	Exact match “Tu aliado para el cuidado de la energía.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Colmai Mecánicas, S.L	Exact match	Galdakao, SpainHQ recorded Sep 17, 2026	11-50	5 contacts →
	Exact match “Colmai Mecánicas es una empresa dedicada a atender las necesidades de Servicios de Mantenimiento de Plantas Industriales, Infraestructuras y Edificios.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Tecmafra,s.L	Exact match	Fraga, SpainHQ recorded Sep 17, 2026	11-50	2 contacts →
	Exact match “Empresa dedicada al mantenimiento industrial.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Hidrozar Aragón, S.L	Exact match	La Puebla De Alfindén, SpainHQ recorded Sep 17, 2026	1-10	1 contacts →
	Exact match “Hidrozar is a machinery company based out of La Puebla de Alfindén, Spain.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “refinery maintenance contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 18 of 99 refinery maintenance contractors based in Spain

See the full list, filter by size, metro and specialty, and access 114 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Refinery maintenance contractors based in Spain at a glance

As of Sep 17, 2026

5.7%Verified-email coverage

20.2Average contacts per company

11-50Median size (employees)

11.1%Largest-city concentration · Madrid

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 99 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Spain whose business descriptions match “refinery maintenance contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 114 professional contacts with verified work emails across the full matched dataset. 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 17, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “refinery maintenance contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many refinery maintenance contractors are there based in Spain?

RevenueBase identified 99 company matches for refinery maintenance contractors associated with Spain as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Grupo Masa tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most refinery maintenance contractors?

Madrid leads with 11 company records, followed by Gijon (5) and Barcelona (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 114 professional contacts with verified work emails tracked across these 99 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 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 SmartSearch, 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.