Flanges Weight Chart Size Chart In Mm And Dimension Chart

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Get the flange data you need before you buy. Our flange reference helps buyers, engineers, fabricators, and project teams compare flange sizes, rough weights, and dimension needs in one simple format. Whether you source stainless steel, carbon steel, or API flanges, this chart and calculator help you plan material faster, write better quotes, and keep buying simple.
The Flanges Weight Chart, Size Chart in mm and Dimension Chart is made for teams that want clear data without extra complexity. Use it to estimate material weight, check basic size fit, and prepare purchase enquiries with the right technical details.
Flange Weight and Dimension Chart Class 150 Flange, Class 300 Flange, Class 600 Flange, Class 900 Flange, Class 1500 Flange, Class 2500 Flange
Class 150 Flange Weight Weight Chart

NOMINAL SIZE
DIMENSIONS
WEIGHT (KG)

NPS
(Inches)
DN (mm)
FLANGE
MM
FLANGE
THICKNESS
SOW
SW
WN
BLIND

1/2
15
88.9
11.2
0.4
0.5
0.4

...
... 3/4
20
98.6
12.7
0.6
0.7
0.6

1
25
108
14.2
0.8
1
0.9

1 1/4
32
117.3
15.7
1
1.3
1.2

1 1/2
40
127
17.5
1.3
1.7
1.5

2
50
152.4
19.1
2.1
2.6
2.4

2 1/2
65
177.8
22.4
3.3
4.1
3.9

3
80
190.5
23.9
3.9
4.9
4.9

3 1/2
90
215.9
23.9
4.8
6.1
6.2

4
100
228.6
23.9
5.3
6.8
7.0

5
125
254
23.9
6.1
8.6
8.6

6
150
279.4
25.4
7.5
10.6
11.3

8
200
342.9
28.4
12.1
17.6
19.6

10
250
406.4
30.2
16.5
24
28.6

12
300
482.6
31.8
26.2
36.5
43.2

14
350
533.4
35.1
34.6
48.4
58.1

16
400
596.9
36.6
44.8
60.6
76.1

18
450
635
39.6
48.9
68.3
93.7

20
500
698.5
42.9
61.9
84.5
122.0

24
600
812.8
47.8
86.9
115
185.0

Class 300 Flanges to ASME B 16.5 Weight Chart

NOMINAL SIZE
DIMENSIONS
WEIGHT (KG)

NPS
(Inches)
DN (mm)
FLANGE
OD
A
MM
FLANGE
THICKNESS
D
MM
SOW
SW
WN
BLIND

1/2
15
95.3
14.2
0.6
0.8
0.6

3/4
20
117.3
15.7
1.1
1.3
1.1

1
25
124
17.5
1.4
1.5
1.4

1 1/4
32
133.4
19.1
1.7
2.0
1.8

1 1/2
40
155.5
20.6
2.5
2.9
2.7

2
50
165.1
22.4
2.9
3.4
3.2

2 1/2
65
190.5
25.4
4.3
5.2
4.9

3
80
215.9
28.4
5.9
6.9
6.8

3 1/2
90
228.6
30.2
7.3
8.7
8.7

4
100
254
31.8
9.6
11.2
11.5

5
125
279.4
35.1
12.3
15.1
15.6

6
150
317.5
36.6
15.6
19.1
20.9

8
200
381
41.1
24.2
29.9
34.3

10
250
444.5
47.6
34.1
42.7
53.3

12
300
520.7
50.8
49.8
61.8
78.8

14
350
584.2
53.8
69.9
85.8
105.0

16
400
647.7
57.2
88.1
106.0
137.0

18
450
711.2
60.5
109.0
131.0
175.0

20
500
774.7
63.5
134.0
158.0
221.0

24
600
914.4
70.0
201.0
230.0
339.0

Class 600 Flanges to ASME B 16.5 Weight Chart

NOMINAL SIZE
DIMENSIONS
WEIGHT (KG)

NPS
(Inches)
DN (mm)
FLANGE
OD
A
MM
FLANGE
THICKNESS
D
MM
SOW
SW
WN
BLIND

1/2
15
95.3
14.2
0.7
0.9
0.8

3/4
20
117.3
15.7
1.3
1.5
1.3

1
25
124.0
17.5
1.5
1.8
1.6

1 1/4
32
133.4
20.6
2
2.5
2.2

1 1/2
40
155.4
22.4
3
3.5
3.3

2
50
165.1
25.4
3.6
4.4
4.2

2 1/2
65
190.5
28.4
5.3
6.4
6.1

3
80
209.6
31.8
7
8.5
8.4

3 1/2
90
228.6
35.1
8.8
10.7
11

4
100
273.1
38.1
14.5
17.4
17.3

5
125
330.2
44.5
24.4
29.2
29.4

6
150
355.6
47.8
28.7
34.9
36.1

8
200
419.1
55.6
43.4
53.9
58.9

10
250
508
63.5
70.3
86.5
97.5

12
300
558.8
66.5
84.2
103.0
124

14
350
603.3
69.9
98.7
122.0
151

16
400
685.8
76.2
142.0
170.0
214

18
450
743
82.6
173.0
204.0
272

20
500
812.8
88.9
220.0
254.0
349.0

24
600
939.8
101.6
312.0
358.0
533.0

Class 900 Flanges to ASME B 16.5 Weight Chart

NOMINAL SIZE
DIMENSIONS
WEIGHT (KG)

NPS
(Inches)
DN (mm)
FLANGE
OD
A
MM
FLANGE
THICKNESS
D
MM
SOW
SW
WN
BLIND

1/2
15
120.7
22.4
1.8
1.9
1.8

3/4
20
130
25.4
2.4
2.6
2.4

1
25
149.4
28.4
3.6
3.7
3.6

1 1/4
32
158.8
28.4
4
4.3
4.1

1 1/2
40
177.8
31.8
5.5
5.9
5.8

2
50
215.9
38.1
10.2
10.8
10

2 1/2
65
244.3
41.1
13.9
15
14

3
80
241.3
38.1
11.6
13.7
13.1

4
100
292.1
44.5
19.7
22.5
26.9

5
125
349.3
50.8
31.9
37.4
36.5

6
150
381
55.6
41.1
47.7
47.4

8
200
469.9
63.5
70.7
81.3
82.5

10
250
546.1
69.9
101.0
119
122.0

12
300
609.6
79.2
133.0
157.0
173.0

14
350
641.4
85.6
153.0
180.0
206.0

16
400
704.9
88.9
185.0
217.0
259.0

18
450
787.4
101.6
258.0
292.0
367.0

20
500
857.3
108.0
317.0
362.0
463.0

24
600
1041.4
139.7
606.0
665.0
876.0

Class 1500 Flanges to ASME B 16.5 Weight Chart

NOMINAL SIZE
DIMENSIONS
WEIGHT (KG)

NPS
(Inches)
DN (mm)
FLANGE
OD
A
MM
FLANGE
THICKNESS
D
MM
SOW
SW
WN
BLIND

1/2
15
120.7
22.4
1.8
1.9
1.8

3/4
20
130
25.4
2.4
2.6
2.4

1
25
149.4
28.4
3.6
3.7
3.6

1 1/4
32
158.8
28.4
4
4.3
4.1

1 1/2
40
177.8
31.8
5.5
5.9
5.8

2
50
215.9
38.1
10.2
10.8
10.1

2 1/2
65
244.3
41.1
13.9
15
14

3
80
266.7
47.8
19.9
19.1

4
100
311.2
53.8
29.9
29.9

5
125
374.7
73.2
55.4
58.4

6
150
393.7
82.6
68.4
71.8

8
200
482.6
91.9
117
122

10
250
584.2
108
194.0
210.0

12
300
673.1
124
288.0
316.0

14
350
749.3
133.4
380.0
420

16
400
825.5
146.1
485.0
558.0

18
450
914.4
162.1
644.0
760.0

20
500
984.3
177.8
775.0
965.0

24
600
1168.4
203.2
1232.0
1558.0

Weight Chart of Class 2500 Flanges to ASME B 16.5

NOMINAL SIZE
DIMENSIONS
WEIGHT (KG)

NPS
(Inches)
DN (mm)
FLANGE
OD
A
MM
FLANGE
THICKNESS
D
MM
WN
BLIND

1/2
15
133.4
30.2
3.1
3.0

3/4
20
139.7
31.8
3.7
3.5

1
25
158.8
35.1
5.2
5.0

1 1/4
32
184.2
38.1
7.7
7.4

1 1/2
40
203.2
44.5
10.9
10.4

2
50
235
50.8
16.2
15.6

2 1/2
65
266.7
57.2
23.7
22.6

3
80
304.8
66.5
36.2
34.8

4
100
355.6
76.2
55.3
53.9

5
125
419.1
91.9
92.5
90.8

6
150
482.6
108
143.0
141

8
200
552.5
127
215.0
214

10
250
673.1
165.1
406.0
411.0

12
300
762
184.2
572.0
592.0

Flange Weights by Pressure Class and Size in mm kg

Pipe Size (inch)
150 #
300 #
600 #
900 #
1500 #
2500 #

WN
SO
BLD
WN
SO
BLD
WN
SO
BLD
WN
SO
BLD
WN
SO
BLD
WN
SO
BLD

1/2″
2
1
1
2
1
1
2
2
2
SEE 1500 # WEIGHTS
5
4
4
7
7
7

3/4″
2
2
2
3
3
3
4
3
3
SEE 1500 # WEIGHTS
6
5
6
8
8
8

1″
3
2
2
4
3
3
4
4
4
SEE 1500 # WEIGHTS
9
8
8
12
11
11

1 1/2″
4
3
3
7
6
6
8
7
8
SEE 1500 # WEIGHTS
13
12
13
25
22
23

2″
6
5
5
9
7
8
12
9
10
SEE 1500 # WEIGHTS
25
25
25
42
37
39

2 1/2″
8
7
7
12
10
12
18
13
15
SEE 1500 # WEIGHTS
36
36
35
52
55
56

3″
10
8
9
15
13
16
23
16
20
31
26
29
48
48
48
94
83
86

4″
15
13
17
25
22
27
42
37
41
53
53
54
73
73
73
145
125
130

5″
19
15
20
32
28
35
68
63
68
86
83
87
130
130
140
245
210
225

6″
24
19
26
42
39
50
81
80
86
110
110
115
165
165
160
380
325
345

8″
39
30
45
67
58
81
120
115
140
175
170
200
275
260
300
580
485
530

10″
52
43
70
91
81
124
190
170
230
260
245
290
455
435
510
1075
930
1025

12″
80
64
110
140
115
185
225
200
295
325
325
415
690
580
690
1525
1100
1300

14″
110
90
140
180
165
250
280
230
355
400
400
520
940
NA
975
NA
NA
NA

16″
140
98
180
250
190
295
390
330
495
495
425
600
1250
NA
1300
NA
NA
NA

18″
150
130
220
320
250
395
475
400
630
680
600
850
1625
NA
1750
NA
NA
NA

20″
180
165
285
400
315
505
590
510
810
830
730
1075
2050
NA
2225
NA
NA
NA

22″
225
185
355
465
370
640
720
590
1000
NA
NA
NA
NA
NA
NA
NA
NA
NA

24″
260
220
430
580
475
790
830
730
1250
1500
1400
2025
3325
NA
3625
NA
NA
NA

Flange Standard Specification

Dimensions: ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Size: 1/2″ (15 NB) to 48″ (1200NB)
Grades- : 300, 301, 301L, 303, 304, 304L, 304H, 310, 310S, 310H, 310, 316L, 316H, 321, 321H, 347, 409, 410, 416, 430, 904L
Special Grades: LF 1, LF 2 F 51, F91.
Class:150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
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
PN: PN6, PN10, PN16, PN25, PN40
JIS: 5K, 10K, 15 K
DUPLEX:2205, 31803
SUPER DUPLEX:F53, F55, F255, 32550
HASTELLOY: C276, C22
MONEL:400, K-500
INCONEL: 600, 625, 718, 800, 825, 850
CUPRO NICKEL: 90-10, 70-30, 80-20, 60-40, 75-25.

Built for Buyers, Engineers, and Project Teams

Flanges come in many types, pressure classes, materials, and standards. Even a small change in size, thickness, bore, or face can change weight, fit, and cost. That is why a reliable flange weight table is useful when ordering industrial piping parts.
This resource is ideal for:

Procurement teams checking flange weights before they ask for a quote
EPC contractors preparing bill of material estimates
Fabricators planning handling and packing
Project engineers checking flange sizes in mm
Stockists and traders preparing customer offers
Maintenance teams replacing pipeline parts
Exporters estimating shipment weight and freight

Instead of rough guesses, use a clear flanges weight chart in kg to make better choices early in the buying process.

What You Can Check

Our flange chart and calculator-style reference helps you review key product data, including:

Nominal flange size in mm
Approximate flange weight in kg
Outside diameter guide
Thickness reference
Bolt hole details
Pressure class check
Material choice
Standard-based flange options
Compare stainless steel and carbon steel flange weights
API flange weight references for common industrial use

Because exact weights can change by standard, maker, bore, grade, and machining, use the chart for estimates, quote prep, and technical comparison. For final buying, our team can confirm the right dimensions and weight for your spec.

Why Flange Weight Matters

Flange weight is more than a tech detail. It affects cost, shipping, install, storage, and safety. When you know the rough weight of each flange, you can plan better from the start.
A reliable Flanges Weight Chart helps with:

Material costing: Heavier flanges use more raw material, so price can rise.
Freight estimates: Weight affects packing, shipping, and export papers.
Handling planning: Large flanges may need lifting gear or special storage.
Project budgeting: Weight estimates help with early cost checks.
Quote accuracy: Buyers can send clearer enquiries with size, class, material, and quantity.
Inventory control: Stockists can sort material by size and weight.

For big projects, even small unit-weight changes can matter when multiplied by hundreds or thousands of flanges.

Available Material References
Stainless Steel Flanges

Use the stainless steel flanges weight chart section to review rough weights for common stainless steel flange needs. Stainless steel flanges are widely used where corrosion resistance, hygiene, and durability matter.
Common applications include:

Chemical plants
Food and drink plants
Marine and offshore sites
Pharma piping systems
Water treatment plants
High-corrosion industrial sites

Flange weight can vary by grade, pressure class, face, bore, and standard. If you need a firm value for a specific grade or flange type, ask for a checked technical quote.

Carbon Steel Flanges

The carbon steel flanges weight chart section is useful for general industrial piping, oil and gas, power generation, construction, and mechanical systems. Carbon steel flanges are often chosen for strength, easy supply, and lower cost.
Typical uses include:

Process pipelines
Refineries
Power plants
Water lines
Structural and mechanical installs
General engineering work

Carbon steel flange weights depend on size, pressure rating, wall thickness, and standard. Our chart gives a practical first check, while final supply details can be confirmed before you order.

API Flanges

For oilfield, drilling, wellhead, and high-pressure work, our API flanges weight chart helps users compare rough weights and sizes for API-style flange needs. These flanges are often used in tough settings where strength, pressure control, and spec control matter.
API flange enquiries should always include the needed standard, pressure rating, size, material grade, and end-use details. Our team can help review your request and share product-specific data where available.

Size Chart in mm for Easier Technical Review
Many global projects need dimensions in millimetres so drawings, specs, and purchase documents match. The Size Chart in mm and Dimension Chart format helps buyers, engineers, and suppliers stay aligned.
You can use the size chart to review:

Nominal bore or NPS reference
Flange outside diameter in mm
Bolt circle diameter in mm
Number of bolt holes
Bolt hole diameter in mm
Flange thickness in mm
Raised face or face type where needed
Approximate weight in kg

This makes it easier to match your purchase enquiry with project documents, especially when you work across global standards or suppliers.
Flange Types Covered

The chart can support common flange types used in industrial piping systems. Availability depends on material, size, pressure class, and standard.
Common flange types include:

Weld neck flanges
Slip-on flanges
Blind flanges
Socket weld flanges
Threaded flanges
Lap joint flanges
Plate flanges
Ring type joint flanges
API flanges
Custom or project-specific flange designs on request

Each flange type has a different shape, thickness, hub profile, and weight. For example, a weld neck flange may weigh differently from a blind flange of the same nominal size and pressure class. That is why choosing the right flange type matters when you use any flange weight calculator or chart.

Easy-to-Use Flange Weight Calculator Support

If you need more than a static chart, our flange weight calculator support can help estimate flange weight from key inputs. This is useful for bulk enquiries, export papers, and early project estimates.
Typical inputs may include:

Flange type
Nominal size
Pressure class
Material choice
Standard
Quantity
Unit weight guide

The calculator-style method helps turn one unit weight into a total project estimate. For example, if you know the weight of one flange and the quantity, you can estimate the total for buying and freight planning.
Because production changes are possible, calculator results should be seen as rough unless checked against a final technical datasheet or supplier-approved drawing.

Key Benefits
Faster RFQ Preparation

Prepare clear purchase enquiries by adding size, material, class, flange type, and estimated quantity. A clear enquiry helps suppliers reply faster and more accurately.

Better Cost Estimation

Weight directly affects material cost and freight. A dependable flanges weight chart in kg helps you set budget needs before you order.

Improved Technical Clarity

Using a dimension chart cuts confusion when comparing flanges by size, thickness, and bolt pattern. This is especially useful when working with global teams.

Useful for Multiple Materials

Whether you need a stainless steel flanges weight chart or a carbon steel flanges weight chart, the resource supports practical comparison across common flange materials.

Suitable for Bulk Orders

For large projects, being able to estimate total flange weight helps with logistics, packing, warehousing, and project planning.

Product Information You Should Provide for a Quote

To receive an accurate offer, include as many of the following details as possible:

Required flange type
Size in mm or nominal pipe size
Pressure class or rating
Material grade
Standard or spec
Facing type
Bore requirement
Quantity
Required certificates or inspection documents
Delivery location
Special packing or export needs

If you do not have full details, you can still send your application details or existing drawing. Our team can help find the best flange reference for your need.

Typical Applications

Flanges are used wherever piping systems need a solid connection, inspection access, easy maintenance, or equipment integration. Our weight and size references are useful for many industries, including:

Oil and gas
Petrochem
Power generation
Water treatment
Shipbuilding
Marine engineering
Construction
Food processing
Pharma production
Mining
HVAC and mechanical systems
General industrial fabrication

From small stainless steel flanges to heavy-duty API flanges, the right size and weight data helps make project work safer and smoother.

Quality and Documentation Support

When sourcing flanges, buyers often need more than size and weight. Depending on the order, documents may include material certificates, inspection reports, test certificates, marking details, packing lists, and compliance documents.
Available documents depend on the material, standard, and order size. If certification is required, say so in your enquiry so the right product route can be confirmed before production or dispatch.

How to Use the Chart Before Ordering
Follow these simple steps:

Choose the flange type for your piping system.
Confirm the nominal size or size in mm.
Choose the pressure class or rating.
Select the material, such as stainless steel, carbon steel, or API-grade parts.
Check the rough unit weight in kg.
Multiply by quantity to estimate total weight.
Check key sizes such as outside diameter, thickness, and bolt hole details.
Send the final need for supplier check and quote.

This process lowers errors and helps your enquiry include the details needed for accurate pricing.
Request Current Price and Confirmed Weight

Ready to source flanges for your project? Share your size, material, class, flange type, and quantity to get a current quote. If you are working from a drawing or spec sheet, send it with your enquiry for faster review.
Use our flange weight table, flange weight calculator support, and size guide to plan your purchase with confidence. For confirmed flange weight, final dimensions, availability, and pricing, contact our sales team today.

Why Choose Our Flange Reference and Supply Support

Choosing the right flange supplier is about more than price. You need accurate data, fast replies, and product know-how that helps you avoid costly mistakes.
Our support is built to provide:

Practical weight and size references
Help with stainless steel, carbon steel, and API flange enquiries
Clear quote support for standard and project needs
Material and size guidance for buying teams
Help with bulk weight checks
Support for local and export orders
Flexible replies based on your technical spec

Whether you need one replacement flange or a full project package, accurate size and weight data is the first step to a successful order.

Get the Right Flange Data Before You Buy

Use the Flanges Weight Chart as a starting point for planning, comparison, and buying. Review the Size Chart in mm and Dimension Chart to understand key dimensions, then request a quote for the exact material, size, pressure class, and standard you need.
For stainless steel, carbon steel, or API flanges, our team can help you confirm rough weights, sizes, and supply options based on your project need.
Send your flange enquiry today and get clear product guidance, current pricing, and confirmed supply details.