TWI CSWIP 3.1 WIS 5 WELDING INSPECTION MATERIALS INSPECTION SECTION 6World Centre for Materials Joining TechnologyCopyright 2005, TWI Ltd

MATERIALS INSPECTIONRolling ImperfectionsDirection of rollingCold Laps*

LaminationsSegregationWorld Centre for Materials Joining TechnologyCopyright 2005, TWI Ltd

MATERIALS INSPECTION.Plate InspectionMaterial TraceabilitySpecification Thickness Length

WidthOther checks may need to be made such as: distortion tolerance, number of plates and storage*World Centre for Materials Joining TechnologyCopyright 2005, TWI Ltd

STRUCTURAL STEELS.Steels can be classified by many different codes & standards, depending on material type & intended use. Typical BS EN Standards for structural steels; BS EN 10025 - Non-alloy structural steels. BS EN 10113-2-Fine grain normalised structural steels. BS EN 10113-3-Fine grain thermomechanical rolled steels.

BS EN 10207- Steels for simple pressure vessels.

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STRUCTURAL STEELS.BS EN 10025 - Non-alloy structural steels. Impact Strength Structural Steel

-J = min 27j-K = min 40j De-oxidation method (Opt) Test temp for impact tests: -R =+20C -0 = 0C -2 = -20C

S 355 J2 G3Min YS for t 16mm: -235

-275-355Copyright 2005, TWI Ltd

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MATERIALS INSPECTIONPlate InspectionMaterial Condition

Lapping

CorrosionLamination

Mechanical Damage

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MATERIALS INSPECTION.MECHANICAL DAMAGEMechanical damage can be defined as any surface material damage cause during the manufacturing process. This can included damage caused by: Grinding Hammering Chiselling Chipping

Breaking off welded attachments (torn surfaces)Chisel Marks Chisel Marks Grinding Marks

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MATERIALS INSPECTION.Mill Scale & RustingRust Grade ASteel surface largely covered with adherent millscale with little or no rust

Rust Grade BSteel surface which has begun to rust and from which millscale has begun to flake

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MATERIALS INSPECTIONRustingRust Grade DSteel surface on which millscale has rusted away. General pitting visible under normal vision.

Rust Grade CSteel surface on which the millscale has rusted away or from which it can be scrapped. Slight pitting visible under normal vision

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MATERIALS INSPECTION.Lapping

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MATERIALS INSPECTION.Lapping

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MATERIALS INSPECTION.

Lamination

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MATERIALS INSPECTIONPipe InspectionMaterial Traceability

Diameter & Ovality

Length

Specification, Heat / Batch NoOther checks may need to be made such as: distortion tolerance, number of pipes and storage conditions*World Centre for Materials Joining TechnologyCopyright 2005, TWI Ltd

MATERIALS INSPECTIONPipe InspectionMaterial Condition.

Mechanical Damage

Corrosion / Pitting

Other checks may also need to be made; distortion, number of pipes & storage conditions.World Centre for Materials Joining TechnologyCopyright 2005, TWI Ltd

MATERIALS INSPECTION.BS EN 10204- METALLIC MATERIALS. Types of documents.Non-Specific Inspection -Type aInspection document type 2.1Declaration of compliance with order. Statement of compliance with order. Validated by manufacturer.

Inspection document type 2.2Test report Statement of compliance with order, with indication of non-specific inspection results. Validated by manufacturer

a. Non-specific inspection may be replaced by specific inspection if specified in the material standard or order

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MATERIALS INSPECTION.BS EN 10204- METALLIC MATERIALS. Types of documents.Specific Inspection -Type bInspection document type 3.1Statement of compliance with order, with indication of results of specific inspection. Validated by manufacturers authorised inspection representative, independent of manufacturing.

Inspection document type 3.2Statement of compliance with order, with indication of results of specific inspection. Validated by manufacturers authorised inspection representative, independent of the manufacturing department, and either the purchasers authorised inspection representative or the inspector designated by official regulations.

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b. Quality management system of the material manufacturer certified by a competent body established within the community and having undergone a specific assement for materials

QUESTIONS ?World Centre for Materials Joining TechnologyCopyright 2005, TWI Ltd

MATERIALS INSPECTION.

QUESTIONS ?World Centre for Materials Joining TechnologyCopyright 2005, TWI Ltd

MATERIALS INSPECTION.Iron and steels specifications can be classified a number of different codes and standards, depending on the material type and intended use. For example API 5LX or ASTM are American standards for the designation of line pipe. A common standard used to designate plate material is BSEN 10025. ( Hot rolled products of non-alloy structural steels). Typical Examples of steel using BS EN 10025 designation would be S275 JRG1 / S355K2G3.

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MATERIALS INSPECTION. S = Structural Steel. 275 / 355 = Minimum Yield Strength: N/mm at T 16mm JR = Longitudinal Charpy, 27Joules @ Room Temperature JO = Longitudinal Charpy, 27Joules @ 0C J2 = Longitudinal Charpy, 27Joules @ - 20C K2 = Longitudinal Charpy, 40Joules @ - 20C G1 = Rimming Steel G2 = Rimming Steel not permitted G3 = Normalised or normalised rolled G4= At manufacturers discretion.World Centre for Materials Joining TechnologyCopyright 2005, TWI Ltd

MATERIALS INSPECTION.Iron Fe Carbon C is for Strength Manganese Mn is for Toughness Silicon Si < 0.3% Deoxidiser Aluminium Al Grain refiner,