Not every time. You can use sensitive leak test, after hidrotest ( normally in construction phase to ensure the integrity of the line)to check the joints out of test during Hydro, like control valves, conections to vessels, towers, exchangers........(STL normally is used during pre-commisioning...
Yes, depending the size of the repair you can apply:
1.- Temper Bead (Half bead)
2.- Weld the repair with IXCONE 182 (Ni Cr 3) or
3.- Repair and new PWHT.
Good days.
If we have a grove in V to be welded with one GTAW pass in root and three SMAW's passes for landfill: is it necessary to t consider (For the WPS) simple for GTAW and multiple pass for SMAW? Or it is considered to be the total grove without discerning the two welding process...
What you want to say with " Falsification of welders certificates ". Papers (WPQ) are not according with ASME IX essential variables for welders and for your process? or there are not evidence of testing (Bend Guided or RT)? I do not deal to t What you refer
There are other variables to have in mind:
1. To elaborate the ITP must have clear the steps of manufacture and the points of inspection required by the codes, specifications and other requirements of the project.
2. To establish the level of inspection (visits, frequency, permanent ....).
3...
Please be more specific over the construccion/Manufacture to which you refer. The points to be including in a ITP change depending of this initial parameter and also to the code, specs and rules to be applying. The points like HOLD POINTS, Check up documentation or witness depend on what you...
My problem is opposite to the raised one for bob74r. For specification of the client the minimum hardness required after PWHT is 200HBN, nevertheless the values are around 170HBN for welds of T-91 (P5B, now P15 E). In no specification I find (including ASTM) minimun values of hardness after...
Totally in agreement with Stanweld. Little more, we can select critical welds by positions of welds, difficult access after welding (Scaffoldings), weld degree of material (5A B for example)..... Sure that NDT before and after PWHT it is not the best desición. A curve showing the cost/ risk for...
A53:Specification for pipi,steel, Black and Hot dipped, Zinc Coated, welded and seamless.
A106; Specification for seamless carbon steel pipe for High temperature service.
A333: Specification forr seamless and welded pipe for Low-Temperature service.
API 5L : Specification for line pipe
Has any one here information about the damage and consequences coming from the use of Hard Stamp (Weld # and Welder #) instead of Low Stress over ss pipe 304 and 316.
I'll stimate your answer
I m looking for a table or a Spec. with the bolt torque and bolt force values (Friction coefficient U= 0.10 to =.12).
Material: Duplex 2205 (UNS S32205- ASTM 479)
Target. To fix an structure cell.
I found nothing in Codes, nothing in google........ May be here, get it.
Thanks
