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General
Core services
- Welding engineering and external welding coordination
- Welding inspection and QA/QC support
- WPS, WPQR and welder qualification
- The DEHAAS Welding & Quality Assistant
- About DEHAAS
- Our approach
- Frequently asked questions
Specialist services
- Hire a welding coordinator
- Welding engineering and technical advice
- Hire a welding inspector
- QA/QC support and temporary QC capacity
- Fabrication inspection at your supplier
- WPS development and management
- WPQR qualification to EN ISO 15614-1 and ASME IX
- EN 1090 support: from execution class to CE marking
- ISO 3834 support: from gap analysis to audit
- NDT coordination: the right method, extent and evaluation
- Vendor inspection and expediting at your suppliers
- Independent welding consultant for technical welding issues
- Remote WPS review and PQR review against the code you work to
- Third-party inspection services and source inspection at your vendor
WPS, WPQR & qualifications
- WPS versus WPQR: what is the difference?
- When do you need a WPQR?
- How to determine whether an existing WPQR covers your application
- Writing a pWPS: variables, sources and pitfalls
- Welder qualification to ISO 9606-1
- Validity and revalidation of welder qualifications
- ASME IX vs EN ISO 15614-1: two systems for procedure qualification
- Qualification range for thickness and diameter under EN ISO 15614-1
- Operator qualification to ISO 14732 for mechanised and orbital welding
- WPQR cost and lead time: where the money goes and how long it takes
- The procedure qualification record (PQR): what it is and how it works
- Welder certification compared: AWS, ASME IX and ISO 9606-1
- Essential variables: what invalidates a qualification
- Adopting a WPQR from a third party
Standards & regulations
- Execution classes under EN 1090-2: EXC1 to EXC4 explained
- ISO 3834 parts 2, 3 and 4: which part fits your company
- The welding coordinator under ISO 14731: when, who and what
- CE marking of steel structures under EN 1090-1
- ISO 5817 quality levels B, C and D: selecting and applying
- Welding under the PED 2014/68/EU: categories and approvals
- AWS D1.1 versus the European standards: the key differences
- Visual testing of welds to ISO 17637
- Material certificates 3.1 and 3.2 to EN 10204
- NDT personnel to ISO 9712: levels, responsibilities and validity
- Factory production control (FPC) under EN 1090-1
- AWS D1.1 prequalified WPS: rules, limits and common mistakes
- ASME Section IX explained
- ISO 15614-1: the welding procedure test explained
- EN 13445: unfired pressure vessels
- EN 15085: welding of railway vehicles
- Image quality in radiography: ISO 19232
Inspection & QA/QC
- Choosing the right NDT method for a welded joint
- Visual weld inspection: from preparation to report
- How to write an ITP that works in practice
- The quality control plan for your fabrication project
- The MRB and MDR: building the project dossier properly
- Weld map and weld log: traceability for every weld
- FAT and final inspection without surprises
- Vendor inspection abroad: control of quality at a distance
- Punch list management: from open item to clean handover
- Weld defects: recognition, causes and prevention
- The NCR: recording, resolving and learning from non-conformities
- CWI vs IWI: welding inspector certification compared
- Radiographic testing (RT) of welded joints
- Ultrasonic testing (UT) of welded joints
- Penetrant testing (PT) of welded joints
- Magnetic particle testing (MT) of welded joints
- Phased array and TOFD
- Hardness testing of welded joints
- Ferrite measurement in stainless and duplex weld metal
Welding practice & processes
- Preheating in welding: when is it required
- Calculating and controlling heat input
- PWHT: post weld heat treatment explained
- Welding duplex stainless steel: key considerations
- Heat tint on stainless welds: pickling and passivation
- MAG welding process 135 and cored wire processes 136 and 138
- TIG welding (141) and orbital welding of pipework
- Submerged arc welding (121): productive and controllable
- Preventing hydrogen cracking: mechanism and measures
- Controlling weld distortion: causes, types and measures
- Robot welding: qualification and control
- Welding fume: limits and duties
Materials & weldability
- Welding austenitic stainless steel: 304 and 316
- Welding aluminium: 5083 and 6082
- Welding fine grain steel: S460 to S690
- Welding nickel alloys and Inconel
- Welding titanium
- Welding cast iron
- Welding wear resistant steel
- Dissimilar metal welds: stainless to carbon steel
- Welding galvanised steel
- Selecting filler metal
- Selecting shielding gas
- Welding copper and bronze