A semi-basic flux for joint welding of high quality steel pipes for pipeline transportation systems in the oil and gas industries. Especially recommended for multi-wire (3 up to 5 wires) submerged arc processes in the two-run technique. Very good weld appearance and slag release providing flat welds with low reinforcement and flat weld interfaces free from undercut.

High grain hardness and resistance to abrasion and a low consumption rate with good flux feeding properties in the transport and recovery system.As a result of low hydrogen levels (less than 5 ml/100 g in the weld deposits) and oxygen levels of about 350 ppm as well as uniform metallurgical behaviour with low silicon and manganese pick-up, constant mechanical properties are obtained even when welding thick-walled tubes in the two-run technique.

Classification:

ISO 14174: S A AB 1 66 AC H5 *)
(EN 760: SA AB 1 66 AC H5)

Characteristics 

Characteristic chemical constituents

Welding Positions:

Flux density: 1.0 – 1.1 kg / dm³ (l)
Grain size acc. to ISO 14174: 2 – 20 ( Tyler 8 x 65)

Welding Flux

Application

Production of longitudinal and spiral welded steel pipe grades L360 or X52 to L555 or X80 according to ISO 3183 / API Spec. 5L.

Flux type: Aluminate-Basic

Metallurgical behaviour acc. to ISO 14174 type of current DC