Lap Joint Pipe Flange

Lap Joint Pipe Flange

The lap joint flanges are used on piping fittedwith lapped pipe or with lap joint stub end. The lap joint flange with the stubend assembly is normally used in systems requiring frequent dismantling forinspection and cleaning. The ability to swivel flanges and to align bolt holeseases formation of large diameter or unusual stiff piping. The lap joint flangeis also used in applications where there is a need to facilitate boltalignment.

The lapjoint pipe flange can move on the pipe and is usually attached to water supplyand drainage accessories. It presses the flange and the steel ring which servesas sealing surface and is not exposed transferring the pressureto the gasket. The lap joint pipe flange is usually found in electricity, oiland gas, petrochemical, chemistry, paper making, metallurgical and otherindustries.

The process to manufacture a lap joint pipe flange is mold forged followed bymachine finished. There are two kinds of lap joint pipe flange,butt welding and flat welding.

1. Butt Welding Lap Joint Pipe Flange
Butt welding lap joint flange’s out diameter is ranging from 3/8" to48" and its nominal diameter from DN10 toDN1200. Our company provides lapjoint flanges to work under pressure in accordance with American standard suchas CLASS 150, CLASS 300, CLASS 400, CLASS 600, CLASS 900, CLASS 1500, CLASS 2500 and Europeanstandard such as PN 2.5, PN 6, PN 10, PN 16, PN 25 and PN 40. We also provide different flange faces in accordance with American standardfor raised face, tongue, groove, female, male and ring joint. European standardfor raised face, tongue, groove, female, male and ring joint are alsoavailable.

Raw Materials
Materials to produce butt welding lap joint pipe flanges are detailed here.
Carbon Steel: A105
Alloy Steel: A182 F 1-F 2-F 5-F 9-F 10-F 91-F 92-F 122-F 911-F 11-F 12-F 21-F22     
Stainless Steel: A182 304-304H-304L-304N-304LN 316-316H-316L-316N-316LN321-321H 347-347H 
Low Temperature Steel: A522 A707 Grade L 1-L 2-L 3-L 4-L 5-L 6-L 7-L8   
High Performance Steel: A694 F 42-F 46-F 48-F 50-F 52-F 56-F 60-F 65-F 70

Standard Available
Our company provides butt welding lap joint pipe flanges of different standardsas follows.
GB/T9112-2000
GB/T9118.1-2000 GB/T9118.2-2000
GB/T9120.1-2000 GB/T9120.2-2000 GB/T9120.3-2000
GB/T9122-2000
GB/T9124-2000
SH/T3406-1996
JB/T74-1994
JB/T75-1994
JB/T84-1994
JB/T85-1994
HG/T20592-2009 HG/T20614-2009
HG/T20615-2009 HG/T20623-2009 HG/T20635-2009
ASME B16.5-2009
EN1092-1-2007 EN1759-1-2004
BS1560-3.1-1989 BS4504-3.1-1989
AFNOR NF E29-200-1-2007
ISO7005-1-1992
JIS B2220-2004

2. Flat Welding LapJoint Pipe Flange
The flat welding lap joint pipe flange out diametercan be from 3/8" to 24" and its nominal diameter from DN10 to DN600.Cangzhou Electricity Pipe-Fittings provides flat lap joint flanges operatingunder pressure in accordance with American standard for CLASS 150, CLASS 300,CLASS 400, CLASS 600, CLASS 900, CLASS 1500, CLASS 2500 and the Europeanstandard for PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40.Our company also provides flat lap joint flanges of different flange faces inaccordance with American standard for raised face,tongue, groove, female, male and European standard for raised face, tongue,groove, female and male.

Raw Materials
Materials to produce flat welding lap joint pipe flanges are detailed here.
Carbon Steel: A105
Alloy Steel: A182 F 1-F 2-F 5-F 9-F 10-F 91-F 92-F 122-F 911-F 11-F 12-F 21-F22
Stainless Steel: A182 304-304H-304L-304N-304LN 316-316H-316L-316N-316LN321-321H 347-347H
Low Temperature Steel: A522 A707 Grade L 1-L 2-L 3-L 4-L 5-L 6-L 7-L 8
High Performance Steel: A694 F 42-F 46-F 48-F 50-F 52-F 56-F 60-F 65-F 70

Standard Available
Our company provides flat welding lap joint pipe flanges of differentstandards as follows.
GB/T9112-2000
GB/T9121.1-2000 GB/T9121.2-2000 GB/T9121.3-2000
GB/T9124-2000
SH/T3406-1996
JB/T74-1994
JB/T75-1994
JB/T83-1994
HG/T20592-2009 HG/T20614-2009
HG/T20615-2009 HG/T20623-2009 HG/T20635-2009
ASME B16.5-2009
EN1092-1-2007 EN1759-1-2004
BS1560-3.1-1989 BS4504-3.1-1989
AFNOR NF E29-200-1-2007
ISO7005-1-1992
JIS B2220-2004