Wellhead & Pressure Control Equipment
API 6A wellheads, Christmas trees, gate valves and chokes from 2,000 to 20,000 psi, PSL 1–4 and material classes AA–HH, assembled and pressure-tested in our Tananger facility.
API Q1 · ISO 9001 · ISO 45001 · in the field since 1994
Pressure control, pipeline integrity and fabrication for oil & gas
Certified equipment, inspection engineers and field crews for operators and EPC contractors in the North Sea, the Middle East and the Permian Basin — with the datasheets, certificates and HSE record to prove it before your first call.
Facility reel: our yard, test cell and crews
Services
What we do — with the standards and ranges to match
Every service page lists operating envelopes, applicable standards, related datasheets and documented projects.
Pipeline Integrity & CUI Inspection
Risk-based pipeline and piping integrity programmes: phased-array UT, corrosion under insulation (CUI) screening, cathodic protection surveys, ILI data assessment and fitness-for-service to API 579.
ASME & NORSOK Fabrication and Machining
Pressure vessels, skids, spools and manifolds fabricated to ASME VIII, ASME B31.3, EN 13445 and NORSOK in carbon steel, 22Cr/25Cr duplex and 6Mo — with 5-axis CNC machining in house.
Field Services & Maintenance Crews
Rotational and call-out crews for valve maintenance, wellhead servicing, bolted-joint integrity and shutdown/turnaround support — pre-qualified in ISNetworld, Avetta and Achilles.
Fluids, Chemicals & Lubricants Supply
Completion fluids, corrosion inhibitors, hydraulic fluids and valve lubricants supplied with current safety data sheets and managed call-off stock at our bases.
Engineering & Technical Consulting
Independent engineering support: equipment selection, API 6A specification review, integrity management plans, failure analysis and life-extension studies.
HSE & certifications
Certificates on display, not behind a login
API, ISO and pre-qualification certificates with numbers and expiry dates, plus our published HSE performance.
View HSE & certifications
API Spec Q1
American Petroleum Institute
Valid until 31 Mar 2028
API 6A Monogram
American Petroleum Institute
Valid until 31 Mar 2028
ISO 9001:2015
DNV
Valid until 30 Nov 2027
ISO 14001:2015
DNV
Valid until 30 Nov 2027
ISO 45001:2018
DNV
Valid until 30 Nov 2027
ASME U-Stamp
ASME
Valid until 30 Jun 2027
Coverage
Guaranteed mobilisation times by region
Six operational bases with crews, spares and workshops. See exactly how fast we can be on site.
Open coverage map-
Norwegian Continental Shelf — South2 hTananger (HQ, workshop & test cell)
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Norwegian Continental Shelf — West4 hMongstad base
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Barents Sea8 hHammerfest
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UK North Sea6 hAberdeen (Dyce)
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Middle East12 hAbu Dhabi (Mussafah)
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Permian Basin24 hMidland, Texas
Projects
Recent projects with measured results
Abu Dhabi, UAE · 2025
CUI screening programme for a gas processing plant
Plant-wide corrosion under insulation screening of 38 km of insulated piping, delivered during operation without a shutdown.
Southern North Sea, Norway · 2024
HPHT wellhead and tree package for a North Sea infill campaign
Design, manufacture and testing of 6 compact wellheads and 15,000 psi Christmas trees to PSL 3G, material class HH-NL.
Mongstad, Norway · 2025
Controlled bolting for a refinery turnaround
Flange management and controlled bolting of 4,800 joints during a planned refinery turnaround.
FAQ
Questions buyers ask before shortlisting us
An engineer reviews every RFQ and replies within 4 business hours with either a quote, a clarification request or a scheduled technical call. Emergency call-outs are answered 24/7 by phone.
Yes. We hold API Spec Q1 registration and an API 6A monogram licence covering wellhead and Christmas tree equipment from PSL 1 to PSL 4. Certificates can be downloaded from the spec library without logging in.
We are ISNetworld Grade A, Avetta approved and qualified in Achilles JQS. Registration numbers are listed on our HSE & Certifications page.
We operate from bases in Tananger, Mongstad and Hammerfest (Norway), Aberdeen (UK), Abu Dhabi (UAE) and Midland, Texas (USA). See the coverage map for response times per region.
Yes. The RFQ form accepts up to 5 files of 25 MB each, including PDF, DWG, DXF, STEP, IGES, Excel and ZIP files.
Our 12-month total recordable incident rate (TRIR) is 0.21 per 200,000 hours, and we publish updated figures on our HSE page every quarter.
Knowledge
Engineering answers
What does effective stop-work authority look like?
Effective stop-work authority means every worker can halt a task without asking permission, the stop is logged and reviewed without blame, and the person who stopped the…
How do I choose the API 6A material class for sour service?
Pick the API 6A material class from the partial pressure of H2S and the CO2 corrosivity: AA/BB/CC for non-sour (sweet) service with increasing CO2, and DD/EE/FF/HH for s…
Who provides pipeline integrity services in the Permian Basin?
Northline Energy Services provides pipeline integrity and CUI inspection in the Permian Basin from its Midland, Texas base, with ISNetworld Grade-A pre-qualification, AP…
Our experts
The engineers behind the work
Ingrid Solheim
Chief Engineer, Pressure Control
24 years of experience
Omar Al-Haddad
Integrity Manager, Middle East
19 years of experience
Kari Nygaard
HSE Director
21 years of experience
James Whitfield
Lead Welding & Fabrication Engineer
17 years of experience