Home » ASTM A182 SS 304 / 304L Lap Joint Flange
UNS S30400, 1.4301, AISI 304, ASTM A182 F304 Lap Joint Flange
UNS S30400, 1.4301, AISI 304, ASTM A182 F304 Lapped Joint Flanges.
UNS S30403, 1.4306, AISI 304L, ASTM A182 F304L Lap Joint Flange
UNS S30403, 1.4307, SUS 304L, ASTM A182 F304L LJ Flange
The Stainless Steel lap joint flanges are designed for piping systems and are typically used in the oil, gas, petrochemical, and chemical industries. A lap joint flange is a type of flange that is used to connect pipes or tubes. They are typically used in low-pressure applications, as they do not provide as much support as other flanges.
The lap joint flange consists of two parts: the flange itself and a stub end. The stub end is welded to the pipe or tube, and the flange is bolted to the stub end. When welding 304 Stainless Steel lap joint flanges, there are a few key things to remember. First, selecting the proper filler metal for the job is important. A filler metal with a similar composition to the base metal is recommended in most cases. This will help ensure a strong, durable weld.
Another important consideration when welding lap joint flanges are ensuring the flange and stub end is properly aligned before welding. This will help ensure the flange sits flush against the mating flange, which is important for creating a strong, leak-free connection.
What are the 304 Stainless Steel lap joint flange welding process steps?
The 304 Stainless Steel lap joint flange welding process involves several steps to ensure a secure and durable weld. The first step is to clean and prepare the flange surfaces to ensure a smooth and clean area for welding. Next, the lap joint flange is placed onto the pipe and aligned, with the edges tacked into place. The inner bore of the flange is then welded to the pipe, followed by the outer circumference of the flange. Once complete, the weld should be inspected and cleaned to ensure it meets quality standards. This process should be repeated on the other side of the flange. It’s important to note that a qualified welder should perform the welding process, following appropriate techniques, using appropriate equipment, and considering safety measures, welding standards, and other relevant regulations.
What are uses of ASTM A182 304L stainless lap joint flange?
ASTM A182 304L stainless lap joint flanges are commonly used in various industrial applications, including in the oil and gas, chemical, and power generation industries. They are well-suited for high-temperature and corrosive environments due to their excellent resistance to corrosion and heat. The lap joint flange design provides a simple, secure method for connecting pipes. It allows for easy assembly and disassembly, making it ideal for applications requiring maintenance and inspection. Additionally, 304L stainless steel offers a low carbon content, which makes it ideal for welding applications and helps to prevent intergranular corrosion. The flange’s versatility and durability make it a popular choice in various industries and applications, including piping systems, flanged fittings, and valves.
Specification : ASTM A182 / ASME SA182
Standard : ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS SP44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
Size : 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
Connect Type/ Flange Face Type : Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Small Male-Female (SMF)
JIS : JIS B2220, JIS B2221, 5K, 10K, 16K, 20K, 30K, 40K, 63K
DIN : DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638, DIN 2673
BS : BS 4504, BS 4504, BS 1560, BS 10
STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
SS 304 | 1.4301 | S30400 | SUS 304 | 304S31 | 08Х18Н10 | Z7CN18‐09 | X5CrNi18-10 |
SS 304L | 1.4306 / 1.4307 | S30403 | SUS 304L | 3304S11 | 03Х18Н11 | Z3CN18‐10 | X2CrNi18-9 / X2CrNi19-11 |
WE MANUFACTURE ASTM A182 STAINLESS STEEL 304 LAP JOINT FLANGE AS PER INTERNATIONAL STANDARDS & SPECIFICATIONS. 304L LAP JOINT FLANGES MANUFACTURERS IN INDIA, CUSTOM SIZES SS 304/304L LAP JOINT FLANGE CAN BE PRODUCED AS PER CLIENT DRAWING.
ASME B16.5 Lap Joint Flange Pressure Ratings | |||||||
---|---|---|---|---|---|---|---|
Temperature (°C) | Class | ||||||
Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 2500 | |
-29 – 38 | 19.8 | 51.7 | 68.9 | 103.4 | 155 | 259 | 431 |
50 | 19.5 | 51.7 | 68.9 | 103.4 | 155 | 259 | 431 |
100 | 17.7 | 51.5 | 68.7 | 103.0 | 155 | 258 | 429 |
150 | 15.8 | 50.2 | 66.8 | 100.3 | 151 | 251 | 418 |
200 | 13.8 | 48.6 | 64.8 | 97.2 | 146 | 243 | 405 |
250 | 12.1 | 46.3 | 61.7 | 92.7 | 139 | 232 | 386 |
300 | 10.2 | 42.9 | 57.0 | 85.7 | 129 | 214 | 357 |
325 | 9.3 | 41.4 | 55.0 | 82.6 | 124 | 207 | 344 |
350 | 8.4 | 40.0 | 53.4 | 80.0 | 120 | 200 | 334 |
375 | 7.4 | 37.8 | 50.4 | 75.7 | 114 | 189 | 315 |
400 | 6.5 | 34.7 | 46.3 | 69.4 | 104 | 174 | 290 |
425 | 5.5 | 28.8 | 38.4 | 57.5 | 86.3 | 144 | 240 |
450 | 4.6 | 23.0 | 30.7 | 46.0 | 69.0 | 115 | 192 |
475 | 3.7 | 17.1 | 22.8 | 34.2 | 51.3 | 85.4 | 142 |
500 | 2.8 | 11.6 | 15.4 | 23.2 | 34.7 | 57.9 | 96.5 |
538 | 1.4 | 5.9 | 7.9 | 11.8 | 17.7 | 29.5 | 49.2 |
DN In inches | Dimension | ASME B16.5 Dimensional Sizes 1/2 inches to 2 1/2 inches | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
125 LBS 150 LBS | 300 LBS | 400 LBS | 600 LBS | 900 LBS | 1500 LBS | 2500 LBS | ||||||||||
inches | millimeter | inches | millimeter | inches | millimeter | inches | millimeter | inches | millimeter | inches | millimeter | inches | millimeter | |||
1/2 | A | 3 1/2 | 88.9 | 3 3/4 | 95.2 | 3 3/4 | 95.2 | 3 3/4 | 95.2 | 4 3/4 | 121 | 4 3/4 | 121 | 5 1/4 | 133.4 | |
b | 7/16 | 11.1 | 9/16 | 14.3 | 9/16 | 14.3 | 9/16 | 14.3 | 7/8 | 22.2 | 7/8 | 22.2 | 1 3/16 | 30.2 | ||
D2 | 1 3/8 | 34.9 | 1 3/8 | 34.9 | 1 3/8 | 34.9 | 1 3/8 | 34.9 | 1 3/8 | 34.9 | 1 3/8 | 34.9 | 1 3/8 | 34.9 | ||
D1 | 2 3/8 | 60.3 | 2 5/8 | 66.7 | 2 5/8 | 66.7 | 2 5/8 | 66.7 | 3 1/4 | 82.6 | 3 1/4 | 82.6 | 3 1/2 | 88.9 | ||
n | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | – | 4 | 44 | ||
d | 5/8 | 15.9 | 5/8 | 15.9 | 5/8 | 15.9 | 5/8 | 15.9 | 7/8 | 22.2 | 7/8 | 22.2 | 7/8 | 22.2 | ||
3/4 | A | 3 7/8 | 98.4 | 4 5/8 | 117.5 | 4 5/8 | 117.5 | 4 5/8 | 117.5 | 5 1/8 | 130 | 5 1/8 | 130 | 5 1/2 | 139.7 | |
b | 1/2 | 12.7 | 5/8 | 15.9 | 5/8 | 15.9 | 5/8 | 15.9 | 1 | 25.4 | 1 | 25.4 | 1 1/4 | 31.8 | ||
D2 | 1 11/16 | 42.9 | 1 11/16 | 42.9 | 1 11/16 | 42.9 | 1 11/16 | 42.9 | 1 11/16 | 42.9 | 1 11/16 | 42.9 | 1 11/16 | 42.9 | ||
D1 | 2 3/4 | 69.8 | 3 1/4 | 82.5 | 3 1/4 | 82.5 | 3 1/4 | 82.5 | 3 1/2 | 88.9 | 3 1/2 | 88.9 | 3 3/4 | 95.2 | ||
n | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | – | 4 | 44 | ||
d | 5/8 | 15.9 | 3/4 | 19 | 3/4 | 19 | 3/4 | 19 | 7/8 | 22.2 | 7/8 | 22.2 | 7/8 | 22.2 | ||
1 | A | 4 1/4 | 108 | 4 7/8 | 123.8 | 4 7/8 | 123.8 | 4 7/8 | 123.8 | 5 7/8 | 149.2 | 5 7/8 | 149.2 | 6 1/4 | 159 | |
b | 9/16 | 14.3 | 11/16 | 17.5 | 11/16 | 17.5 | 11/16 | 17.5 | 1 1/8 | 28.6 | 1 1/8 | 28.6 | 1 3/8 | 34.9 | ||
D2 | 2 | 50.8 | 2 | 50.8 | 2 | 50.8 | 2 | 50.8 | 2 | 50.8 | 2 | 50.8 | 2 | 50.8 | ||
D1 | 3 1/8 | 79.4 | 3 1/2 | 88.9 | 3 1/2 | 88.9 | 3 1/2 | 88.9 | 4 | 102 | 4 | 102 | 4 1/4 | 108 | ||
n | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | ||
d | 5/8 | 15.9 | 3/4 | 19 | 3/4 | 19 | 3/4 | 19 | 1 | 25.4 | 1 | 25.4 | 1 | 25.4 | ||
1 1/4 | A | 4 5/8 | 117.5 | 5 1/4 | 133.4 | 5 1/4 | 133.4 | 5 1/4 | 133.4 | 6 1/4 | 159 | 6 1/4 | 159 | 7 1/4 | 184.2 | |
b | 5/8 | 15.9 | 3/4 | 19 | 13/16 | 20.6 | 13/16 | 20.6 | 1 1/8 | 28.6 | 1 1/8 | 28.6 | 1 1/2 | 38.1 | ||
D2 | 2 1/2 | 63.5 | 2 1/2 | 63.5 | 2 1/2 | 63.5 | 2 1/2 | 63.5 | 2 1/2 | 63.5 | 2 1/2 | 63.5 | 2 1/2 | 63.5 | ||
D1 | 3 1/2 | 88.9 | 3 7/8 | 98.4 | 3 7/8 | 98.4 | 3 7/8 | 98.4 | 4 3/8 | 111 | 4 3/8 | 111 | 5 1/8 | 130 | ||
n | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | ||
d | 5/8 | 15.9 | 3/4 | 19 | 3/4 | 19 | 3/4 | 19 | 1 | 25.4 | 1 | 25.4 | 1 1/8 | 28.6 | ||
1 1/2 | A | 5 | 127 | 6 1/8 | 155.6 | 6 1/8 | 155.6 | 6 1/8 | 155.6 | 7 | 177.8 | 7 | 177.8 | 8 | 203 | |
b | 11/16 | 17.5 | 13/16 | 20.6 | 7/8 | 22.2 | 7/8 | 22.2 | 1 1/4 | 31.8 | 1 1/4 | 31.8 | 1 3/4 | 44.5 | ||
D2 | 2 7/8 | 73 98 | 2 7/8 | 73 | 2 7/8 | 73 | 2 7/8 | 73 | 2 7/8 | 73 | 2 7/8 | 73 | 2 7/8 | 73 | ||
D1 | 3 7/8 | 4 | 4 1/2 | 114 | 4 1/2 | 114 | 4 1/2 | 114 | 4 7/8 | 124 | 4 7/8 | 124 | 5 3/4 | 146 | ||
n | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | ||
d | 5/8 | . 15.9 | 7/8 | 22.2 | 7/8 | 22.2 | 7/8 | 22.2 | 1 1/8 | 28.6 | 1 1/8 | 28.6 | 1 1/4 | 31.8 | ||
2 | A | 6 | 152.4 | 6 1/2 | 165.1 | 6 1/2 | 165.1 | 6 1/2 | 165.1 | 8 1/2 | 215.9 | 8 1/2 | 215.9 | 9 1/4 | 234.9 | |
b | 3/4 | 19 | 7/8 | 22.2 | 1 | 25.4 | 1 | 25.4 | 1 1/2 | 38.1 | 1 1/2 | 38.1 | 2 | 50.8 | ||
D2 | 3 5/8 | 92.1 | 3 5/8 | 92.1 | 3 5/8 | 92.1 | 3 5/8 | 92.1 | 3 5/8 | 92.1 | 3 5/8 | 92.1 | 3 5/8 | 92.1 | ||
D1 | 4 3/4 | 121 | 5 | 127 | 5 | 127 | 5 | 127 | 6 1/2 | 165.1 | 6 1/2 | 165.1 | 6 3/4 | 171 | ||
n | 4 | 4 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | ||
d | 3/4 | 19 | 3/4 | 19 | 3/4 | 19 | 3/4 | 19 | 1 | 25.4 | 1 | 25.4 | 1 1/8 | 28.6 | ||
2 1/2 | A | 7 | 177.8 | 7 1/2 | 190.5 | 7 1/2 | 190.5 | 7 1/2 | 190.5 | 9 5/8 | 244 | 9 5/8 | 244 | 10 1/2 | 266.7 | |
b | 7/8 | 22.2 | 1 | 25.4 | 1 1/8 | 28.6 | 1 1/8 | 28.6 | 1 5/8 | 41.3 | 1 5/8 | 41.3 | 2 1/4 | 57.2 | ||
D2 | 4 1/8 | 104.8 | 4 1/8 | 104.8 | 4 1/8 | 104.8 | 4 1/8 | 104.8 | 4 1/8 | 105 | 4 1/8 | 105 | 4 1/8 | 105 | ||
D1 | 5 1/2 | 139.7 | 5 7/8 | 149.2 | 5 7/8 | 149.2 | 5 7/8 | 149.2 | 7 1/2 | 190.5 | 7 1/2 | 190.5 | 7 3/4 | 197 | ||
n | 4 | 4 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | ||
d | 3/4 | 19 | 7/8 | 22.2 | 7/8 | 22.2 | 7/8 | 22.2 | 1 1/8 | 28.6 | 1 1/8 | 28.6 | 1 1/4 | 31.8 |
Nom. Pipe Size |
Outside Diam. |
Thkn. (min.) |
O.D. of Raised Face |
Hub Diam. |
Length Thru Hub | Bore | Approx. Weights (lbs) | Drilling | |||||||||
Wldg. Neck |
Slip-on Sock. W Hub Bld |
Lap Joint | Slip-on Sock W. |
Lap Joint | Depth of Socket |
Wldg. Neck |
Slip-on Thrd Sock W. |
Lap Joint | Blind | No. Holes | Diam. Holes | Bolt Circle Diam. |
|||||
O | C | R | X | Y1 | Y2 | Y3 | B2 | B3 | D | ||||||||
2 | 6 | 0.69 | 3.62 | 3.06 | 2.50 | 1 | 1 | 2.44 | 2.46 | 0.69 | 6 | 5 | 5 | 5 | 4 | 0.75 | 4.75 |
3 | 7.50 | 0.88 | 5 | 4.25 | 2.75 | 1.19 | 1.19 | 3.57 | 3.60 | 0.81 | 10 | 8 | 8 | 9 | 4 | 0.75 | 6 |
4 | 9 | 0.88 | 6.19 | 5.31 | 3 | 1.31 | 1.31 | 4.57 | 4.60 | 0.94 | 15 | 13 | 13 | 17 | 8 | 0.75 | 7.50 |
5 | 10 | 0.88 | 7.31 | 6.44 | 3.50 | 1.44 | 1.44 | 5.66 | 5.69 | 0.94 | 19 | 15 | 15 | 20 | 8 | 0.88 | 8.50 |
6 | 11 | 1 | 8.50 | 7.56 | 3.50 | 1.56 | 1.56 | 6.72 | 6.75 | 1.06 | 24 | 19 | 19 | 26 | 8 | 0.88 | 9.50 |
8 | 13.50 | 1.12 | 10.62 | 9.69 | 4 | 1.75 | 1.75 | 8.72 | 8.75 | 1.25 | 39 | 30 | 30 | 45 | 8 | 0.88 | 11.75 |
10 | 16 | 1.19 | 12.75 | 12 | 4 | 1.94 | 1.94 | 10.88 | 10.92 | 1.31 | 52 | 43 | 43 | 70 | 12 | 1 | 14.25 |
12 | 19 | 1.25 | 15 | 14.38 | 4.50 | 2.19 | 2.19 | 12.88 | 12.92 | 1.56 | 80 | 64 | 64 | 110 | 12 | 1 | 17 |
14 | 21 | 1.38 | 16.25 | 15.75 | 5 | 2.25 | 3.12 | 14.14 | 14.18 | 1.63 | 110 | 90 | 105 | 140 | 12 | 1.12 | 18.75 |
16 | 23 | 1.44 | 18.50 | 18 | 5 | 2.50 | 3.44 | 16.16 | 16.19 | 1.75 | 140 | 98 | 140 | 180 | 16 | 1.12 | 21.25 |
18 | 25 | 1.56 | 21 | 19.88 | 5.50 | 2.69 | 3.81 | 18.18 | 18.20 | 1.94 | 150 | 130 | 160 | 220 | 16 | 1.25 | 22.75 |
20 | 27.50 | 1.69 | 23 | 22 | 5.69 | 2.88 | 4.06 | 20.2 | 20.25 | 2.13 | 180 | 165 | 195 | 285 | 20 | 1.25 | 25 |
22 | 29.50 | 1.81 | 25.25 | 24.25 | 5.88 | 3.12 | 4.25 | 22.22 | 22.25 | 2.38 | 225 | 185 | 245 | 355 | 20 | 1.38 | 27.25 |
24 | 32 | 1.88 | 27.25 | 26.12 | 6 | 3.25 | 4.38 | 24.25 | 24.25 | 2.50 | 260 | 220 | 275 | 430 | 20 | 1.38 | 29.50 |
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
SS 304 | 0.08 max | 2 max | 0.75 max | 0.045 max | 0.030 max | 18 – 20 | – | 8 – 11 | – |
SS 304L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 18 – 20 | – | 8 – 13 | – |
Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
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