straight HAZ

[vks1986]

Dear all,


how can get straight haz in smaw and gmaw weldability test of api 5l X70M pipe in 5G position (circumference joint)
we have prepare half "K" joint geometry with root gap 14mm with baking.
so what is secrets behind to get straight haz.

if any material to study..

 

[kingnero]

What do you mean by "straight HAZ"? HAZ is formed due to the heat input of the welding process. Weld straight and steady, get a straight and uniform HAZ.

 

[stanweld]

Why the K-bevel? Single bevel (45 degree) -to-square bevel. I assume that this requirement involves Purchaser specifications to qualify the WPS with impact tests along the HAZ of the square bevel edge to assure maximum inclusion of the HAZ in the impact test.