6.0. INSPECTION (PART C) 6.12. RADIOGRAPHIC INSPECTION The imperfection shall be considered as defect should any of the following conditions exist: 9.3.1.Inadequate 9.3.1.Inadequate Penetration without Hi-Low (IP) 9.3.2.Inadequate 9.3.2.Inadequate Penetration Due To Hi-Low (IPD) 9.3.3.Inadequate 9.3.3.Inadequate Cross Penetration (ICP) 9.3.4.Incomplete 9.3.4.Incomplete Fusion (IF) 9.3.5.Incomplete 9.3.5.Incomplete Fusion Due To Cold-Lap (IFD) 9.3.6.Internal 9.3.6.Internal Concavity (IC)
a) L of individual individual indication > 25mm b) L of aggregated indications in any continuous 300mm > 25mm c) L of aggregated indications in any weld less than 300mm > 8% of weld length a) L of individual indication > 50mm b) L of aggregated indications in any continuous 300mm > 75mm a) L of individual indication > 50mm b) L of aggregated indications in any continuous 300mm > 50mm a) L of individual indication > 25mm b) L of aggregated indications in any continuous 300mm > 25mm c) L of aggregated indications in any weld less than 300mm > 8% of weld length a) L of individual indication > 50mm b) L of aggregated indications in any continuous 300mm > 50mm c) L of aggregated aggregated indications in any weld weld > 8% of weld length length Any length of IC is acceptable acceptable if density density of Radiographic Image Image of IC does not exceed that of thinnest adjacent parent metal. Otherwise the criteria for burn-through are applicable.
9.3.8.Elongated 9.3.8.Elongated & Isolated Slag Inclusions (ESI & ISI) 9.3.8.3. OD < 60.3mm 9.3.9.Porosity 9.3.9.2.Individual 9.3.9.2.Individual or Scattered (P) 9.3.9.Porosity 9.3.9.3.Cluster 9.3.9.3.Cluster (CP) 9.3.9.Porosity 9.3.9.4.Hollow-bead 9.3.9.4.Hollow-bead (HB) 9.3.10.Cracks 9.3.10.Cracks (C) 9.3.11.Cover 9.3.11.Cover pass (EU) and Root pass (IU) Undercutting 9.3.12.Accumulation 9.3.12.Accumulation of imperfections (AI), excluding IPD and EU/IU 9.3.13.Pipe 9.3.13.Pipe or fitting imperfections
a) Max. Dimension > 6mm, and the density of BT’s image exceeds that of thinnest adjacent parent metal. b) Max. Dimension > T, and the density of BT’s image exceeds that of thinnest adjacent parent metal. c) Sum of the Max. Dimensions of serrated BTs in any continuous 300mm or total weld length (which ever is less) > 13mm, and the density of BT’s image exceeds that of thinnest adjacent parent metal a) Max. Dimension > 6mm, and the density of BT’s image exceeds that of thinnest adjacent parent metal. b) Max. Dimension > T, and the density of BT’s image exceeds that of thinnest adjacent parent metal. c) More than one BT of any size is presented, and the density of BT’s image exceeds that of thinnest adjacent parent metal a) L of ESI > 50mm b) L of aggregated ESI indications in any continuous 300mm > 50mm c) Width of ESI > 1.6mm d) L of aggregated ISI indications in any continuous 300mm > 13mm e) Width of ISI > 3mm f) More than 4 ISI indications max-3mm are presented in any continuous 300mm g) Aggregate L of ISI and ESI > 8% of the weld length a) L of ESI > 3*T b) Width of ESI > 1.6mm c) Aggregate L of ISI and ESI > 8% of the weld length a) Size of P > 3mm b) Size of P > 25% of T c) The distribution of P exceeds the concentration permitted in Figure 19 or 20 a) Diameter of CP > 13mm b) L of aggregated CP indications in any continuous 300mm > 13mm c) P within CP > 2mm a) L of individual HB > 13mm b) Aggregated L of HB in any continuous 300mm > 50mm c) L of each individual HB in length are serrated by less than 50mm > 6mm d) Aggregate L of all HB > 8% of weld length a) The C of any size or location in weld, but is not shallow shallow crater crack / star crack b) L of the Shallow crater crack / star crack > 4mm Aggregated Length of EI & UI indications in any combination in any continuous 300mm 300mm length of weld exceeds 50mm. Aggregated Length of EI & UI indications in any combination > 1/6 1/6 of weld length. length. a) Aggregate L of indications in any continuous 300mm > 50mm b) Aggregated L of indications > 8% of weld length Imperfection in the pipe/fittings shall be reported to the company. Their disposition shall be as directed by the company.
T - the thinner of the Nominal wall thicknesses joined
L –length of indication
9. ACCEPTANCE STANDARDS FOR NONDESTRUCTIVE TESTING
9.4.1.2.Any 9.4.1.2.Any indications with the maximum dimension 1.6mm or less shall be classified as non-relevant. 9.4.2. Acceptance standards
The linear indications shall be considered defects should any of the following conditions exist: a) Linear indications evaluated as crater/star cracks > 4mm in length b) Linear indications evaluated as cracks c) Linear indications evaluated as IF in any continuous 300mm > 25mm, or 8% of weld length Rounded indications shall be evaluated according to the criteria of 9.3.8.2 and 9.3.8.3 as applicable. 9.4.3. Pipe or fitting imperfections – the same as 9.3.13
9.5.1.2. Any indications with the maximum dimension 2mm or less shall be classified as non-relevant. 9.5.2. Acceptance standards
The linear indications shall be considered defects should any of the following conditions exist: a) Linear indications evaluated as crater/star cracks > 4mm in length b) Linear indications evaluated as cracks c) Linear indications evaluated as IF in any continuous 300mm > 25mm, or 8% of weld length Rounded indications shall be evaluated according to the criteria of 9.3.8.2 and 9.3.8.3 as applicable. 9.5.3. Pipe or fitting imperfections – the same as 9.3.13
9.6.2. Acceptance standards
The imperfection indications shall be considered defects should any of the following conditions exist: 9.6.2.1. Indication determined to be crack (C) – defect 9.6.2.2. Linear Surface Indication (LS) a) Aggregate L of LS in any continuous 300mm > 25mm b) Aggregate L of LS > 8% of weld length 9.6.2.3. Linear Buried Indication (LB) a) Aggregate L of LB in any continuous 300mm > 50mm b) Aggregate L of LB > 8% of weld length 9.6.2.4. Transverse indications (T) other than cracks T indications shall be considered and evaluated as volumetric indications. 9.6.2.5. Volumetric Clusters (VC) Maximum dimension of VC > 13mm 9.6.2.6. Volumetric Individual (VI) Maximum dimension of VI in both width & length > 6mm 9.6.2.7. Volumetric Root (VR) a) Maximum Dimension of VR > 6mm b) Total length of VR indications in any 300mm > 13mm 9.6.2.8. Any Accumulation of Relevant Indications (AR) a) Aggregate Length of Indication in any 300mm > 50mm b) Aggregate Length of Indication > 8% of weld length 9.6.3. Pipe or fitting imperfections – the same as 9.3.13
> 0.8mm or >12.5% of of WT wh whichever is smaller > 0.4mm 0.4mm or >6% >6% - 12.5% 12.5% of WT whicheve whicheverr is smaller smaller <=0.4 0.4mm or <=6% of WT whi which chev eve er is is sma small ller er
Not acceptable 50mm 50mm in any any continuous continuous 300m 300mm m or weld weld length length whichever whichever is smaller smaller Acce ccepta ptable, ble, regar gardles dlesss len lengt gth h
