Polyethylene composition for pipe applications with improved sagging properties

A polyethylene composition comprising,

• a base resin (A) comprising
• a copolymer of ethylene and at least one comonomer selected from alpha-olefins having from three to twelve carbon atoms,
• wherein the ethylene copolymer comprises a low molecular weight component (A-1) and a high molecular weight component (A-2) with the low molecular weight component (A-1) having a lower weight average molecular weight than the high molecular weight component (A-2),
• (B) carbon black in an amount of 1.0 to 10 wt % based on the total amount of the polyethylene composition, and
• (C) optional further additives other than carbon black;
• wherein the base resin (A) has a density of equal to or more than 943 kg/m3 to equal to or less than 957 kg/m3, determined according to ISO 1183, and
• the composition has a melt flow rate MFRs (190° C., 5 kg) of equal to or more than 0.12 g/10 min to equal to or less than 0.20 g/10 min, determined according to ISO 1133, a shear thinning index SHI2.7/210 of equal to or more than 80 to equal to or less than 130 and a viscosity at a constant shear stress of 747 Pa, eta747, of equal to or more than 700 kPas to equal to or less than 1200 kPas.