TCM 2 1043-(R) – Paolo Astori SPA – Gattico (IT) PQ395

3 Replies to “TCM 2 1043-(R) – Paolo Astori SPA – Gattico (IT) PQ395”

1. EN2906-070:
   1st NDT is carried out after nut forming.
   2nd NDT is carried out after passivation. Generally, NDT is done after any surface finishing.
   As per ASTM E1417, we have this requirement: “6.8.2 Surface Coatings—All coatings and other surface conditions, such as, paint, plating, corrosion, etc. shall be removed from the area to be examined prior to penetrant examination. The penetrant examination shall precede any surface finish, such as anodize, except for inservice parts that may be examined without removing the anodize.”
   FPI requires the use of some products (penetrant, developer…). How can we make sure that these kind of products are not detrimental for passivation?
   After FPI, parts shall be cleaned. Does cleaning operation affect passivation performance?
   Do we have the same study as this done for qualification 981?

   NDT: sampling carried out is 32 parts.
   Mfg batch size is 236.
   As per EN3004, discontinuities have AQL = 0,065%
   For this AQL, we have a down arrow marked against sample size 32 to reach 200 parts.
   So, 200 parts should have been inspected instead of 32.
   (See ISO2859-1, table II-A or ANSI/ASQ Z1.4, normal inspection for both).

   Dimensions: sampling carried out is 32 parts.
   Mfg batch size is 236.
   As per EN3004, some dimensions have AQL = 1%
   For this AQL, we have a down arrow marked against sample size 32 to reach 50 parts.
   So, 50 parts should have been inspected instead of 32 for dimensions with AQL = 1%.
   (See ISO2859-1, table II-A or ANSI/ASQ Z1.4, normal inspection for both).

   Hardness:
   As per EN3004, clause 5.4.9, sampling for acceptance shall be as per table 6, column A.
   Mfg batch size is 236 nuts.
   So, 8 nuts should have been hardness tested instead of 3.

   EN2907-070:
   Hardness:
   As per EN3004, clause 5.4.9, sampling for acceptance shall be as per table 6, column A.
   Mfg batch size is 5474 nuts.
   So, 20 nuts should have been hardness tested instead of 5.

   Many thanks in advance,
   Best regards.

   Reply

2. 1. EN2906-070:
   1st NDT is carried out after nut forming.
   2nd NDT is carried out after passivation. Generally, NDT is done after any surface finishing.
   As per ASTM E1417, we have this requirement: “6.8.2 Surface Coatings—All coatings and other surface conditions, such as, paint, plating, corrosion, etc. shall be removed from the area to be examined prior to penetrant examination. The penetrant examination shall precede any surface finish, such as anodize, except for inservice parts that may be examined without removing the anodize.”
   FPI requires the use of some products (penetrant, developer…). How can we make sure that these kind of products are not detrimental for passivation?
   After FPI, parts shall be cleaned. Does cleaning operation affect passivation performance?
   – -> All products used during FPI inspection are according to AMS2644 specification (Inspection material, penetrant). We also perfomed internal tests on our parts to verify if FPI materials and final cleaning chemical products (NaOH based) could be detrimental for surface CP finishing such as passivation. No difference has been detected before and after FPI complete process.

   Do we have the same study as this done for qualification 981?
   -> Yes, the raw material is always A286.

   NDT: sampling carried out is 32 parts.
   Mfg batch size is 236.
   As per EN3004, discontinuities have AQL = 0,065%
   For this AQL, we have a down arrow marked against sample size 32 to reach 200 parts.
   So, 200 parts should have been inspected instead of 32.
   (See ISO2859-1, table II-A or ANSI/ASQ Z1.4, normal inspection for both).
   -> Yes, you are correct. See attached the TR and FAI revised.

   Dimensions: sampling carried out is 32 parts.
   Mfg batch size is 236.
   As per EN3004, some dimensions have AQL = 1%
   For this AQL, we have a down arrow marked against sample size 32 to reach 50 parts.
   So, 50 parts should have been inspected instead of 32 for dimensions with AQL = 1%.
   (See ISO2859-1, table II-A or ANSI/ASQ Z1.4, normal inspection for both).
   – -> Yes, you are correct. See attached the TR and FAI revised.

   Hardness:
   As per EN3004, clause 5.4.9, sampling for acceptance shall be as per table 6, column A.
   Mfg batch size is 236 nuts.
   So, 8 nuts should have been hardness tested instead of 3.
   –> Sampling shall be per Table 6, column B ( See Par. 5.4.9). So, I think that 3 pcs is correct.

   EN2907-070:
   Hardness:
   As per EN3004, clause 5.4.9, sampling for acceptance shall be as per table 6, column A.
   Mfg batch size is 5474 nuts.
   So, 20 nuts should have been hardness tested instead of 5.
   –> Sampling shall be per Table 6, column B ( See Par. 5.4.9). So, I think that 5 pcs is correct.

   Reply

3. All is clear now.
   Approved on my side.
   Best regards.

   Reply