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Lap Joint Flange
Lap Joint Flange
Lap Joint Flange
Lap Joint Flange
Lap Joint Flange

Lap Joint Flange


Common Outer Diameters: 1/2'' to 24''

Wall Thickness Schedule: SCH 10, SCH 40, SCH 160

Pressure Ratings: Class 150 to Class 2500

Face Type: RF, RTJ

Standard: ASTM A105, ASTM A182

Material: Alloy Steel, Stainless Steel, nickel alloy, duplex stainless steel, titanium, etc....

Specifications

Product Name: Big forged steel flange, large forging lap joint flange, buy cheap lap forged joint flange forging

Material: Monel 400, monel k500, hastelloy c276, hastelloy c22, inconel 625, inconel 718, inconel 600, incoloy 800, alloy 20, ss2005, 304L, 316, 312, .....

Standards: ASTM A105, ASTM A182....

Sizes: 1/2'' to 24'', Customized up to 48'', customised

Thickness: Schedule 10(S) to SCH 160

Pressure Ratings: Class 150 to 2500

Description

Lap Joint pipe flanges are often used for applications that require frequent dismantling. Lap joint flange (simplified as LTF flange) shape is similar to slip on flange, it has a curved radius at the bore, which can connect with a stub end fittings and slide over the pipe. In this form, the pipe is usually welded to this stub end so the lap joint flange can rotate freely around the stub end .

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Lap Joint flanges go by a range of names, including: Back Up flanges, Loose Ring flanges, Loose Hubbed flanges, Van Stone flanges.

They’re a two-part flange consisting of a Lap Joint Stub End which is butt welded to the pipe and a backing lap joint flange which is slid onto the pipe before welding the Stub End.

Forged flanges combine two separate machinery parts together. They can be an extension to a structure in order to make the object stronger. Industrial flanges have numerous uses including connecting sheets, pumps, pipes and structures that specifically require an intermediate point of connection.

Proffesional forging flange manufacturer and supplier, High quality low price large diameter flange, forging flange large lap joint flange price list, big flange for sale.

Lap Joint Flange Sizes

Pipe FlangeHubDrilling templateWeightStock standard
Nom.sizeO.DDJbhrmlkNo. Of holeskg/pceASTM 316L
in.mmmmmmmmmmmmmmmmmm   
1/2
3/4
1
1 ½
21.3
26.7
33.4
48.3
88.9
98.6
108.0
127.0
22.9
28.2
35.1
50.0
11.2
12.7
14.2
17.5
15.7
15.7
17.5
22.4
3.0
3.0
3.0
6.4
30.2
38.1
49.3
65.0
15.7
15.7
15.7
15.7
60.5
69.9
79.2
98.6
4
4
4
4
0.390
0.560
0.780
1.320
-
-
-
-
2
3
4
6
60.3
88.9
114.3
168.3
152.4
190.5
228.6
279.6
62.5
91.4
116.8
171.5
19.1
23.9
23.9
25.4
25.4
30.2
33.3
39.6
7.9
9.7
11.2
12.7
77.7
108.0
134.9
192.0
19.1
19.1
19.1
22.4
120.7
152.4
190.5
241.3
4
4
8
8
2.060
3.850
5.300
7.450
-
-
-
-

Technology and Method of Forging Steel Flange

Its technology and method includes free forging, die forging and fetal membrane forging. According to the quality of the forgings and number of production batches, different forging methods are selected.

Free Forging

The free forging productivity is low, the machining allowance is large, but the tool is simple and the versatility is large, so it is widely used for forging a single piece and a small batch of forgings with a simple shape.

Die Forging

The die forging is collectively referred to as model forging, in which the heated blank is placed in the forging die fixed on the die forging equipment.

Forged Steel Flange

It has good streamline shape and compact structure, have good mechanical properties.

If the forging process is improper, the grain will be large or uneven, and the hardening crack will occur.

Forgings is compatible with high shear and tensile forces.

The internal structure of the forging is uniform.

Why use a lap joint flange?

A lap-joint flange is a two-component assembly, with a stub end that has a lap-joint ring flange placed over it. The stub end is then butt welded to the pipe, and the flange ring can be rotated to align with the mating flange. This type of flange connection is particularly useful for large or hard-to-adjust flanges.

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