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We have used every time E308H for base material 304H, 321H or 347H

You can make the certification according ASME SEC. IX and do the tests according to the both standards: ASME SEC. IX and EN ISO 9606-2. The NoBo which will issue the certificate should state in the certificate that it complies with PED requirements. Also, the period of validity of the...

@Dhurjati Sen - the location of the plant is in Europe @weldstan - some of the welds were made in shop and some in site, but the welders worked clean; Like I've said above, we've repaired the welds which cracked first time, but again the same welds started to crack again. It's not possible that...

The welds are looking ok from inside (see the attachment)https://files.engineering.com/getfile.aspx?folder=4d81f3b7-b766-4631-9247-d1ac3c76a0cc&file=Welds_WHB.pdf

Thank you for the informative links. I will start to review them. The welds didn't required PWHT. We have check the hardness and it was under 200HV10. In case of operating parameters of the boiler we don't have acces to them, but I am not so sure that they respect them. I have attached a...

We used ER70S-6 as filler material. I dont't think the filler material is the problem as we use in general this filler material for carbon steel welding. In my opinion I think there is not a problem of welding. I've checked the RT films and they were clean. No pores were found that could...

Hello everyone, I have a weird situation regarding some carbon steel welds (base material P265GH). We installed a Waste Heat Boiler and after 3 weeks of operation some welds in the main steam line generate transversal cracks. We replaced the pipe and the fittings and make new welds. After...