Spark arrester for pipeline

The utility model discloses a spark arrester for pipeline, which comprises a housin, the both ends of casing are connected with first flange and second flange respectively, be provided with the inletport in the first flange, be provided with the venthole in the second flange, the casing includes that outside -in sets gradually first barrel and second barrel, be provided with the cooling ball between first barrel and the second barrel, be connected with parallel arrangement's first back -fire relief board and second back -fire relief board on the inner wall of second barrel, it hinders fire core to be provided with between first back -fire relief board and the second back -fire relief board, all be provided with a plurality of through -holes on first back -fire relief board and the secondback -fire relief board, through -hole on the first back -fire relief board and the through -hole on the second back -fire relief board are the staggered arrangement, second barrel and second barrel all include cylindrical sec