X70 JCOE big OD LSAW steel pipe mechanical widening process

- Jan 30, 2019-

X70 JCOE big OD LSAW steel pipe mechanical widening process


According to domestic TMCP microalloy pipeline steel yield strength greater Rt0.5 changes the status quo, targeted for X70 pipeline steel in one power plant adopted the JCO + mechanical expanding manufacturing craft, obtained the corresponding yield strength, tensile strength, showed, and the change of impact toughness curves, points plate steel tube under different hole enlargement rate of mechanical properties change rule of microstructure on mechanical properties and function mechanism, this paper expounds the selection of hole enlargement technology practice, half given JCOE straight seam submerged arc welding pipe production line of X70 pipeline steel plate suggest acceptance limit.



The acceptance conditions of raw steel sheet for welded pipe are generally in accordance with the steel pipe standards, so there is a certain fluctuation range for the mechanical property acceptance of steel sheet for steel pipe manufacturers.For each raw material supplier, there are not only different carbon equivalent, alloy ratio, but also different rolling cooling process, and pipe production and the use of different molding process and different diameter, processing hardening and bauschinger effect are also different.Therefore, it is necessary for the pipe factory to establish a personalized steel pipe production process on the basis of the composition and properties of the sub-plate steel plate, so as to reduce the production cost on the premise of ensuring the quality of steel pipe.

FINISHED PRODUCT


  S355J0H EN10210 Annealing LSAW Steel Pipe

 

S355J0H EN10210 Annealing LSAW Steel Pipe

 

S355J0H EN10210 Annealing LSAW Steel Pipe

  

PRODUCT LINE


S355J0H EN10210 Annealing LSAW Steel Pipe

 

S355J0H EN10210 Annealing LSAW Steel Pipe

 

QUALITY CONTROL


S355J0H EN10210 Annealing LSAW Steel Pipe

 

THIRD PARTY INSPECITON 


 

S355J0H EN10210 Annealing LSAW Steel Pipe

 

APPLICATION


S355J0H EN10210 Annealing LSAW Steel Pipe

S355J0H EN10210 Annealing LSAW Steel Pipe