Lap Joint Flange
Lap Joint Flanges(Loose Flanges) are used with a corresponding stub-end that "inserts" in the inside of the flange. The main benefit of this type of flange, is that once the pipe welds to the insert stub-end, the flange then can rotate for easier alignment of the bolting holes. However, lap joint flanges and their stub-ends' ability to hold pressure is about the same as slip-on flanges. They are not suitable for situations with a high external or changing loads of force. They do provide an advantage in a piping system that needs frequent dismantling for inspection or to remove build-ups.
Size
Lap Joint Flange(Loose Flange):3/8"-80"
DN10-DN2000
Pressure
America Series:Class 150 ,Class 300, Class 600, Class 900A ,Class 1500,Class 2500.
Europe Series:PN2.5,PN6,PN10,PN16,PN25,PN40,PN63,PN100,PN160,PN250,PN320,PN400.
Flange Facing Types
America Series:Flat face(FF),Raised face(RF),Tongue(T),Groove(G),Female(F),Male(M),Ring type joints face(RJ/RTJ)
Europe Series: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)
Material
Carbon steel: ASTM A105,ASTM A105N,GB 20,C22.8.
Alloy steel: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP 911
Stainless steel: 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
CSA Z245.12
EN1092-1,EN1759-1.
DIN2642,DIN2655,DIN2656.
BS1560,BS 4504,BS 10.
AFNOR NF E29-200-1
ISO7005-1
AS2129
JIS B2220
UNI 2276. UNI 2277.UNI 2278 .UNI 6089 .UNI 6090
Industrial Processes
Die forging,Machining.
Application for Lap Joint flange(LJ flange) /Loose flanges
Natural gas,chemical,petroleum,ship building,marine,paper making, metallurgy, electric, power, boiler , etc.
Standard Specification
PM 10
DN | Pipe OD | D | B2 | C1 | K | E | L | Qtty. | weight |
| Up to DN 40 see PN40 |
| From DN 50 to DN 150 see PN16 |
| 200 | 219,1 | 340 | 226 | 24 | 295 | 6 | 22 | 8 | 8,87 |
| 206,0** | 340 | 213 | 24 | 295 | 6 | 22 | 8 | 8,87 |
| 250 | 273,0 | 395 | 281 | 26 | 350 | 8 | 22 | 12 | 11,20 |
| 256,0** | 395 | 264 | 26 | 350 | 8 | 22 | 12 | 11,20 |
| 300 | 323,9 | 445 | 333 | 26 | 400 | 8 | 22 | 12 | 12,80 |
| 306,0** | 445 | 315 | 26 | 400 | 8 | 22 | 12 | 12,80 |
| 350 | 355,6 | 505 | 365 | 30 | 460 | 8 | 22 | 16 | 19,40 |
| 400 | 406,4 | 565 | 416 | 32 | 515 | 8 | 26 | 16 | 26,40 |
| 450 | 457,0 | 615 | 467 | 36 | 565 | 8 | 26 | 20 | 32,20 |
| 500 | 508,0 | 670 | 519 | 38 | 620 | 8 | 26 | 20 | 38,50 |
| 600 | 610,0 | 780 | 622 | 42 | 725 | 8 | 30 | 20 | 52,20 |
PN 16
DN | Pipe OD | D | B2 | C1 | K | E | L | Qtty. | weight |
| Up to DN 40 see PN40 |
| 50 | 60,3 | 165 | 65 | 20 | 125 | 5 | 18 | 4 | 2,52 |
| 54,0** | 165 | 62 | 20 | 125 | 5 | 18 | 4 | 2,52 |
| 65 | 76,1 | 185 | 81 | 20 | 145 | 6 | 18 | 8 | 3,05 |
| 70,0** | 185 | 75 | 20 | 145 | 6 | 18 | 8 | 3,05 |
| 80 | 88,9 | 200 | 94 | 20 | 160 | 6 | 18 | 8 | 3,48 |
| 84,0** | 200 | 89 | 20 | 160 | 6 | 18 | 8 | 3,48 |
| 100 | 114,3 | 220 | 120 | 22 | 180 | 6 | 18 | 8 | 4,20 |
| 106,0** | 220 | 113 | 22 | 180 | 6 | 18 | 8 | 4,20 |
| 125 | 139,7 | 250 | 145 | 22 | 210 | 6 | 18 | 8 | 5,21 |
| 131,0** | 250 | 138 | 22 | 210 | 6 | 18 | 8 | 5,21 |
| 150 | 168,0 | 285 | 174 | 24 | 240 | 6 | 22 | 8 | 6,89 |
| 156,0** | 285 | 164 | 24 | 240 | 6 | 22 | 8 | 6,89 |
| 200 | 219,1 | 340 | 226 | 26 | 295 | 6 | 22 | 12 | 9,31 |
| 250 | 273,0 | 405 | 281 | 29 | 355 | 8 | 26 | 12 | 13,50 |
| 300 | 323,9 | 460 | 333 | 32 | 410 | 8 | 26 | 12 | 18,00 |
| 350 | 355,6 | 520 | 365 | 35 | 470 | 8 | 26 | 16 | 27,00 |
| 400 | 406,4 | 580 | 416 | 38 | 525 | 8 | 30 | 16 | 34,60 |
| 450 | 457,0 | 640 | 467 | 42 | 585 | 8 | 30 | 20 | 44,60 |
| 500 | 508,0 | 715 | 519 | 46 | 650 | 8 | 33 | 20 | 62,00 |
PN 25
DN | Pipe OD | D | B2 | C1 | K | E | L | Qtty. | weight |
| From DN 50 to DN 150 see PN16 |
| 200 | 219,1 | 360 | 226 | 32 | 310 | 6 | 26 | 12 | 13,80 |
| 250 | 273,0 | 425 | 281 | 35 | 370 | 8 | 30 | 12 | 19,40 |
| 300 | 323,9 | 485 | 333 | 38 | 430 | 8 | 30 | 16 | 25,50 |
PN 40
DN | Pipe OD | D | B2 | C1 | K | E | L | Qtty. | weight |
| 10 | 17,2 | 90 | 21 | 14 | 60 | 3 | 14 | 4 | 0,60 |
| 15 | 21,3 | 95 | 25 | 14 | 65 | 3 | 14 | 4 | 0,65 |
| 20 | 26,9 | 105 | 31 | 16 | 75 | 4 | 14 | 4 | 0,91 |
| 25 | 33,7 | 115 | 38 | 16 | 85 | 4 | 14 | 4 | 1,08 |
| 32 | 42,4 | 140 | 47 | 18 | 100 | 5 | 18 | 4 | 1,77 |
| 40 | 48,3 | 150 | 53 | 18 | 110 | 5 | 18 | 4 | 2,02 |
| 44,5** | 150 | 50 | 18 | 110 | 5 | 18 | 4 | 2,02 |
| 50 | 60,3 | 165 | 65 | 20 | 125 | 5 | 18 | 4 | 2,65 |
| 65 | 76,1 | 185 | 81 | 22 | 145 | 6 | 18 | 8 | 3,36 |
| 80 | 88,9 | 200 | 94 | 24 | 160 | 6 | 18 | 8 | 4,18 |
| 100 | 114,3 | 235 | 120 | 26 | 190 | 6 | 22 | 8 | 5,87 |
| 125 | 139,7 | 270 | 145 | 28 | 220 | 6 | 26 | 8 | 7,95 |
| 150 | 168,3 | 300 | 174 | 30 | 250 | 6 | 26 | 8 | 9,97 |
** Dimension not included in EN 1092-1
Additional dimensions, pressure rates and materials on request
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