Re: [MW:17854] Mechanical Testing

Dear Rems,

i. Exactly the coupon will not cover your mentioned tests. In those cases you will search through your Spec. and probably it should allow duplicating the test coupon (or may be more).

ii. Yes, generally machining of rounded tensile test from your sample is possible but it will not be a full size and will be subsize specimen, so again go through your Spec. and find the subsized dimensions.

iii. Generally using the same sample for hardness/macro and other tests is not forbidden, but the sample size you need for macro/hardness is too much smaller than those you need for SSCC (or may be HIC). Actually you have to weld more test coupons for this purpose. (Question 1)

iv. Some Spec's regardless of the previous tests on consumables, need to do these test because of evaluating the actual conditions in PQR's, so yes and it is depend on your Spec. In some cases you may find a note somewhere in the spec. that clarify the action whenever consumables have previous tests based on the standards which is applicable by your main code.

Regards

On Thu, May 30, 2013 at 12:55 PM, Rems Okonkwo <rems.okonkwo@gmail.com> wrote:

Dear All,

I am to qualify a welding procedure on a 6 inches x 14.3mm and the following test will be required according to API 1104and Client specification;

1.         2 transverse tensile

2.         4 Side Bend Test

3.         1 Macrography alone

4.         1 Macrography + Hardness

5.         1 All weld Tenile test

6.         3 set of Charpy @ WMC, FL, FL+2

7.         1 Weld Metal Chemical Analysis @ root zone and filler passes

8.         Micro analysis of the to capture the fusion lines b/w the weld and the base material

9.         SCC test at 12, 3 and 6 o'clock positions.

 

the following are my question.

 

i.      Will the test coupon be enough to extract all the required samples for the required test

 

ii.    Is it posibly to perform an All Weld Tensile test on 6inches pipe considering the fact that the test sample will be curved.

 

iii.    The location where the SCC test sample will be drawn has other test samples like Charpy and Hardness/Macro to be taken, can I use the same sample for the hardness/macro for the SCC test.

 

iv.   Is it necessary to still perform All weld tensile test when the consumable comply to ASME II part C SFA5.01 class C5 for covered electrodes (SMAW) and Class S3 for bare wire (GTAW) and the level of test is Schedule I.

 

Please I need your response as soon as you can.

 

thanks

 

Rems Okonkwo

Nigerdock Nig PLC

Snake Island Lagos

+2348063305867

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