Product Details:
Usage/Application Industrial
Type Lap Joint Flanges
Size 1-5 inch, 0-1 inch, 20-30 inch, 5-10 inch, 10-20 inch
Material Standard ASTM A182, ANSI B16.5, ASTM A351, ASTM A105
Rated Pressure (Bar) 2500
I Deal In New Only
Material Stainless Steel
Country of Origin Made in India
We can offer vide range of Lap Joint Flanges from ready stock or on make to order basis are currently supplying to UK, Iran(Tehran), Saudi Arabia, Spain, Bahrain, Nigeria, Dubai, Egypt, Malaysia, etc. Various steel products such as Angles, Channels, Beams, Billets, Blooms, Round Bars, Square Bars, Rectangular Bars, Flat Bars, Forged Bars, Rolled Bars, Concast Bars, Pipe Fittings, Elbow, Tee, Reducer, Cross, Stub End, End Caps, Forged Stampings, Pipes, Tube, Tubing, Fasteners, Bolts, Nuts, Washers, Screws, Studs, Plates, Sheets, Coil, etc.
Specifications: Can offer Lap Joint Flanges as cast, forged, normalized, annealed, quenched (hardened) tempered condition with black or bright (proof machined) finish.
Various type of IBR approved Flanges that can be procured are as follows: Blind, Slp-On, Welding Neck (Weldneck), Long Welding Neck (LWN), Socket Weld, Lap Joint, Threaded, Spectacle Blind, Plate, Collar, Flat Face, Raised Face, Ring Type Joint, etc.
Size range of flanges that can be offered are �½â?? inch upto 60â?? inch depending on type, class grade of flanges.
Class of flanges: #150, #300, #400, #600, #900, #1500, #2500
Lap joint flanges feature a flat face and are always used in conjunction with a stub end.
Lap joint flanges resemble, in shape, slip-on flanges except for the radius at the crossing of the flange face and the bore to accommodate the flanged portion of the stub end.
A lap joint flange slips over the pipe and seats on the back of the stub end and the two are kept together by the pressure of the bolts.
The use of lap joint flanges in combination with stub ends is a cost-effective solution for stainless steel or nickel alloy pipelines, as the material of the lap joint flange can be of a lower grade (generally carbon steel) than the material of the stub end (which has to match the pipe grade, as in contact with the conveyed fluid).
This arrangement, therefore, has these two advantages:
reduces the overall cost of the pipelines flanged joints, as the use of higher grade materials is minimized;
bolting operations are simplified, as the lap joint flange can be rotated around the pipe to help with bolts alignment.
Lap Joint flanges are used on piping fitted with lapped pipe or with lap joint stub ends. The lap joint flange with the stub end assembly are normally used in systems requiring frequent dismantling for inspection and cleaning and where the ability to swivel flanges and to align bolt holes materially eases the erection of large diameter or unusually stiff piping. These flanges are also used in applications where there is a need to facilitate bolt alignment. These type of flanges are similar to slip-on flanges. The only difference is that it has a curved radius at the bore and face to accommodate a lap joint stub end. They may be used at all pressures and are available in a full size range. These lap joint flanges slip over the pipe, and are not welded. They are otherwise fastened to it. Here the bolting pressure is transferred to the gasket by the pressure of the flange against the back of the pipe lap.
DIMENSION SPECIFICATIONS AS PER THE INTERNATIONAL STANDARD ASTM, ASME, API, AISI, BS, ANSI, DIN, JIS, MSSP, NACE
SIZE :
½" to 48" (As Per Customer Requirement)
CLASS :
150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS DIN Standard ND-6, 10, 16, 25, 40 Etc
MATERIAL GRADE:
Carbon Steel Lap Joint Flange : ASTM A105, ASTM A 694 F42
Low Temperature Carbon Steel Lap Joint Flange : A350 LF2/A350 LF3
Copper Alloys Lap Joint Flange :
ASTM / ASME SB 61 / 62 / 151 / 152
C 70600 (CU -NI- 90/10
C 71500 (CU -NI- 70/30)
UNS NO. C 92200, UNS NO. C 83600,UNS NO C 10100
C 10200, C 10300, C 10800, C 12000, C 12200
Alloy Steel Lap Joint Flange : ASTM SA 182 F1/F5/F9/F11/F22/F91
ADVANTAGE OF LAP JOINT FLANGES:
Lap Joint flanges have certain special advantages over other flanges. These are as follows:
Lap Joint flanges have the freedom to swivel around the pipe. This facilitates the lining up of opposing flange bolt holes.
Lack of contact with the fluid inside the pipe leads to the greater durability of these flanges.
In piping systems which corrode or erode quickly, the lap joint flanges may be salvaged for re-use.
The pressure-holding capacity of lap joint flanges is little. But it is better than that of slip-on flanges.
The Lap Joint works as a backing ring on the stub.
The main advantage of lap joint flange is that the bolt holes can be aligned with the matching flange after the welds have been completed.
They allow rotational alignment capability.
VALUE ADDED SERVICES :
Hot Dip Galvanizing
Electro Polish
Test Certificate As Per EN 10204 - 3.1 & 3.2
A lap joint flange is a type of flange that is used in piping systems. It is made up of two parts: a stub end and a lap joint ring flange. The stub end is butt welded to the pipe, and the lap joint ring flange is then slid over the stub end. The flange ring has a flat face that is used to seal against the gasket.
Technical Specifications
Material: Carbon steel, stainless steel, alloy steel
Size: 1/2" to 48"
Pressure class: 150 to 2500
Face type: Flat Face
Sealing method: Gasket
Advantages of Lap Joint Flanges
Easy to install and maintain
Can be used in a variety of materials and sizes
Available in a variety of pressure classes
Applications
Lap joint flanges are used in a variety of applications, including:
Chemical processing
Oil and gas
Power generation
Water treatment
The lap joint flange has two components, one stub end, and loose backing flange. The end piece is welded end to end to the pipe and the support flange moves freely on the pipe. The support flange may be of different material from the stub material and normally of carbon steel to save cost. The cover flange is used when frequent disassembling is required, and space is limited. The flange of the lap joint is almost identical to a slip-on flange, except that it has a radius at the intersection of the bore and flange face.
These flanges are nearly identical to a Slip On flange with the exception of a radius at the intersection of the flange face and the bore to accommodate the flanged portion of the Stub End.
The lap joint flange is practically identical to a slip-on flange except it has a radius at the intersection of the bore and flange face. This radius is necessary to have the flange accommodate a lap joint stub end. Normally, a lap joint flange and a lap joint stub end are mated together is an assembly system. Sizes we make range from 1/2" to 64" (and much larger size according to customers' demands).
RFP India is a determined manufacturer of high quality of industrial lap joint flanges in India It is very much similar to slipon flange where it is having a radius at the junction of the bore and flange face that is for to create a lap stub end In the meantime the look on the stub end forms out by means of the gasket face on the flange Lap Joint flanges are being used in applications where parts of the piping systems need to be taking away from each other quickly and easily for inspection and replacement These lap joint flanges are being provided in fullscale range and are extensively used at all the pressures
RANGE
15 NB to 60 1500NB in 150 LBS 300 LBS 600 LBS 900 LBS 1500 LBS 2500 LBS ASA 150 ASA 300 PN 6101625 4064100160 ETC available with NACE MR 0175
SIZE
15NB to 60 1500NB
CLASS PRESSURE
Class Pressure 150 300 600 900 1500 2500 PN6 PN10 PN16 PN25 PN40 PN64
DIMENSION
B165 BS4504 EN1092 B1636 B1647 B1648 MSS SP44
STD
STD ANSI Flanges ASME Flanges DIN Flanges EN Flanges BS Flanges API JIS NACE etc
FEATURES
Dimensional accuracy Corrosion resistance High efficiency Excellent finish Durable
Stainless Steel Lap Joint Flanges
Standard ASTM ASME ASA 182
Grade F 304 304L 304H 309S 309H 310S 310H 316 316TI 316H 316L 316LN 317 317L 321 321H 347 347H 904L
Duplex Steel Lap Joint Flanges
Standard ASTM ASME ASA 182
Grade F 44 F 45 F51 F 53 F 55 F 60 F 61
Aluminium Lap Joint Flanges
Standard ASTM B247 B361
Grade 2024 6061 6063 6101 7075
Titanium Lap Joint Flanges
Standard ASTM B381
Grade Grade 1 Grade 2 Grade 4 Grade 5 Grade 6 Grade 7 Grade 9 Grade 19 Grade 23
Carbon Steel Lap Joint Flanges
Standard ASTM A 105A694 A350 LF3A350 LF2
Grade F42465256606570
Low Temperature Carbon Steel Lap Joint Flanges
Standard ASTM A 350 LF2 A350 LF3
Alloy Steel Lap Joint Flanges
Standard ASTM A182
Grade F1F5F9F11F22F91
Copper Alloy Lap Joint Flanges
Standard ASTM ASME SB 61 62 151 152
Grade UNS NO C 70600 CU NI 9010 C 71500 CU NI 7030 C 71640
Nickel Alloy Lap Joint Flanges
Standard ASTM ASME SB 564 160 472
Nickel 200 UNS N02200 Â Â Nickel 201 UNS N02201 Â Â Monel 400 UNS N04400
Monel K500 UNS N05500 Â Â Inconel K600 UNS N06600 Â Â Inconel 601 UNS N06601
Inconel 625 UNS N06625 Â Â Inconel 800 UNS N08800 Â Â Inconel 800H UNS N08810
Inconel 825 UNS N08825 Â Â Hastelloy C276 UNS N10276 Â Â Alloy 20 UNS N08020
Test Certificate
Manufacturer Test Certificate as per EN 10204 31
