Lap Joint Flange(Loose Flange) have all the same common dimensions as any other flange named on this page however it does not have a raised face, they used in conjunction with a “Lap Joint Stub End”.
They may be used at all pressures and are available in a full size range. These flanges slip over the pipe, and are not welded or otherwise fastened to it. Bolting pressure is transmitted to the gasket by the pressure of the flange against the back of the pipe lap (Stub End).
Lap Joint flanges have certain special advantages:
1.Freedom to swivel around the pipe facilitates the lining up of opposing flange bolt holes.
2.Lack of contact with the fluid in the pipe often permits the use of inexpensive carbon steel flanges with corrosion resistant pipe.
3.In systems which erode or corrode quickly, the flanges may be salvaged for re-use.
Haihao Lap Joint Flanges(Loose Flanges) are available in various sizes and material for you to choose from.
Class 150 ,Class 300, Class 600, Class 900A ,Class 1500,Class 2500.
Flat face(FF),Raised face(RF),Tongue(T),Groove(G),Female(F),Male(M),Ring type joints face(RJ/RTJ)
Type A(Flat Face),Type B(Raised Face),Type C(Tongue),Type D(Groove),Type E(Spigot),Type F(Recess),Type G(O-Ring Spigot),Type H(O-Ring Groove)
ASTM A105,ASTM A105N,GB 20,C22.8.
ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP 911
ASTM/ASME A403 WP 304-304L-304H-304LN-304N
ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti
ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H
Low temperature steel:
ASTM/ASME A402 WPL 3-WPL 6
High performance steel:
ASTM/ASME A860 WPHY 42-46-52-60-65-70
|Standards||ASME ANSI B16.5,ASME ANSI B16.47.API 605,API 6L.
MSS SP 44
BS1560,BS 4504,BS 10.
AFNOR NF E29-200-1
UNI 2276. UNI 2277.UNI 2278 .UNI 6089 .UNI 6090
|Industrial Processes||Die forging,Machining.|
|Application||Natural gas,chemical,petroleum,ship building,marine,paper making,metallurgy,electric, power,boiler etc.|
Hebei Haihao group as a first class manufacturer of Lap Joint Flange(Loose Flange) in China,supplys a variety of steel flanges to satisfy our customers’ specifica requirements,which include different size,different schedule,different pressure and different finish faces. Our products are produced strictly according to the required standard. Our raw material for weld neck flanges all are purchased from big steel companies which can make sure the material in a high quality.
We sincerely welcome customers domestic and abroad to visit us for cooperation and development.