(built-in couplings) high-pressure mud hose/ rotary hose/ vibrat hose NJG-SZ NNG-SZ

• application:

hose is flexible connection between top of stpipe vertically move swivel on offshe inl oil drilling explation.vibrat hose is flexible connection between mud pump manifold stpipe, f adjustment isolating vibration.

• utive stard: api spec 7k / iso 6807 / gb/t 24145

• api monogram no.: 7k-0458

• hose structure:

tube: nitrile rubber based liner sealing layer, oil resistance, seawater resistance, high temperature resistance.

breaker layer external protection layers : high tension textile fabric

maj reinfcement f withsting pressure: high strength steel cable

cover: neoprene based rubber f antiflaming, wear resistance, oil resistance, ozone & ageing resistance,uv resistance, which is desigened f marine environment.

• fire proof requirement:

regular supplied hose meets fire proof grade sr6a, which is 704℃ × 5min

firerated hose supplied as per request with extra fiber glass out layers f fire shield, meet fire proof grade sr6b, which 704℃ × 30min

• embedded electric heat trace cable is available as request f low temperature operating condition.

• different option of external protection layer are available as request by our recommenddation accding to individual operation condition, f example stainless steel arm outer wrap, embedded stainless steel wire in cover, polyethylene spiral guard, etc.

• wking temperature range: class ⅱ , -25 to +100° c

• flexibility specification level: fsl2

• maximum continuous length: 70m

• length tolerance: length up to 6.4m, with tolerance ± 64 mm; length longer than 6.4m with tolerance ± 1％

• measurement basis of minimum bending radius (mbr) is center line of each hose