In the catalog collar flanges GOST 12821-80 are represented by butt-welded parts:
- from steel 20;
- from steel 09G2S;
- stainless;
- galvanized.
The size range of connecting fittings corresponds to the size range of custom-made seamless steel pipes.
The price for a collar flange is higher than for a flat one due to the greater metal consumption and manufacturing complexity. In addition, the overall product increases the volume of the line into which it is built. Despite this, the details of this design are the most in demand, since the economic benefits of their use are obvious.
Collar flange features
Unlike flat flanges, collar flanges are made with a so-called "collar" (skirt ring). A symmetrical protrusion in the form of a truncated cone with a groove, which complements the design, creates conditions for precise mating with the pipe, allows the part to be reused without the need to cut the pipe to which it is attached.
Collar length from 1 to 10 cm can be located perpendicular or oblique to the base. For small pipes, narrow collar flanges are recommended, such modifications allow leveling pressure losses. The truncated cone reduces the stress on the base, because it transfers the forces to the pipe, thereby creating the operational balance of the assembly.
The collar-type flange is not mounted on the pipe, like a flat one, but is butt-welded to the end of the pipe with the formation of one weld. The collar is easily spliced to the pipe, installation requires less skill than welding flat flanges.
Mounting holes for fasteners (threaded studs or bolts) are made at the base of the product, for connection with a counter flange.
Steel collar flanges GOST 12821-80 are used when completing pipeline systems with nominal pressure from 0.1 to 20.0 MPa, transporting liquid and gaseous working media with temperatures from -253 to +600 degrees Celsius. Connecting fittings are necessary to create sealed circuits, used to connect pipes to each other, as well as when leading them to pumping units, devices, vessels, tanks and other process equipment.
How to buy collar flanges GOST 12821-80 at Gremir LLC?
In the company "Gremir" you can buy collar flanges with deferred payment. Special conditions apply to legal entities over 3 years old. Gremir LLC sells collar flanges according to low prices with delivery across Russia. To buy connecting fittings, reserve the desired positions through the application through the basket. When choosing, be guided by the dimensional characteristics of the products, the material of manufacture, take into account the expected operating conditions, cost.
Pipeline connecting fittings form several groups of parts for mounting pipeline parts or connecting containers, units and other types of equipment to it by tightening with bolts or studs. This type of product includes collar flanges, the design of which is somewhat different from similar products. They have a conical protrusion along the diameter of the pipe and are butt welded with this protrusion to the pipe.
| № | Steel collar flange GOST 12821-80 | Price with VAT |
|---|---|---|
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Collar steel welded flanges GOST 12821 |
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| 1 | Collar flange 1-15-25 st.20 GOST 12821-80 | 100.00 rub. |
| 2 | Collar flange 7-100-63 st.20 GOST 12821-80 | 160.00 rub. |
| 3 | Collar flange 1-150-40 st.09G2S GOST 12820-80 | 220.00 rub. |
| 4 | Collar flange 1-300-160 st.15X5M GOST 12820-80 | 308.00 rub. |
| 5 | Collar flange 1-400-25 st.20 GOST 33259-2015 | 375.00 rub. |
| 6 | Collar flange 1-600-25 st.20 GOST 33259-2015 | 475.00 rub. |
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Collar flanges according to GOST in stock and to order from a manufacturer in Moscow |
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How collar flanges and fittings are made
Butt-welded steel flanges are identical in the manufacturing method to the manufacturing methods for similar types of shut-off pipe fittings. They are made from high-quality rolled metal or blanks obtained by hot forging / stamping, followed by mechanical processing. They can be made by:- electroslag (TSEShL) centrifugal casting;
- forging parts;
- hot stamping;
- steel strip bending;
- gas cutting;
The company uses in its work all methods of manufacturing steel collar flanges with invariably high requirements for the quality of its products. The most convenient and, of course, profitable area is cooperation on an ongoing basis. By becoming a regular customer of the company, you will immediately feel all the benefits of your position, first of all, this concerns participation in promotions and other events related to cheaper products. Plus - excellent quality and timely delivery.
Features of valves
Since the role of shut-off valves, in particular steel collar flanges, in the operation of pipelines and equipment is enormous, the requirements for them are very high. Reliability engineering system directly depends on the quality of flange connections of pipeline parts. Modern technologies allow to produce stop valves very high quality.
Constant monitoring of product quality standards, resistance of products to corrosion, resistance to aggressive environments is an incomplete list of requirements to which neck flanges are subject. To withstand aggressive environments, preference is given to products made of of stainless steel. Collar flanges can be used both as independent fasteners and in combination with rings, gaskets, washers and other sealing elements.
Shut-off valves, which include collar flanges, are the key to the tightness of the pipeline, so the requirements are comparable to the operating conditions.
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Manufacturing method |
Order designation (example) |
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|---|---|---|
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From high-quality rolled metal or blanks obtained by hot forging / stamping, followed by mechanical processing |
Flanges are manufactured from DN 10 to DN 1600, execution of connecting sizes - 1 - 5, 8, 9. |
Butt-welded steel flange DN 200 mm on PN 6.3 MPa (63.0 atm) from steel 20 with a connecting ledge version 2 |
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Nominal pressure from 0.1 MPa (1 kgf/cm2) to 20 MPa (200 kgf/cm2) |
Flange 2-200-63 st.20 GOST 12821-80 |
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Medium temperature from minus 253°С to plus 600°С. |
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Used to attach pipe fittings(gate valves, valves, gates) to pipelines and pipelines to equipment (pumps, tanks, heat exchangers), as well as for connecting individual sections of pipelines to each other |
Flanges according to GOST 12821-80 - a steel part, with the help of which the installation and connection of parts of the pipeline and pipeline fittings is carried out. The connection (pipe and flange) is made by butt welding the flange to the pipe.
Scheme of joining the neck flange to the pipe
The flange GOST 12821-80 is butt-welded to the pipe, in contrast to the flat one, and is scalded along the contour with a continuous weld.
Choice of collar flanges
The choice of flanges GOST 12821-80 depends on the necessary parameters for attaching it to the mating element. The diameter of the flange Du (mm), the required working pressure Ru (kgf / cm2), the design of the sealing surface, the steel grade, as well as the method of production are taken into account.
The geometric characteristics and mounting dimensions of collar flanges during their design and production are reflected in GOST 12821-80, the size range of the sealing surface is selected according to GOST 12815-80, collar flanges, like flat ones, can have 9 options for the clamping surface.
Production of flanges according to GOST 12821-80
Collar flanges can be made from a cast or forged billet (forging).
Our company manufactures and supplies flanges from a forged or stamped billet, the so-called forging according to GOST 8479-70, in the production of a stainless collar flange, forging according to GOST 25054-81 is used as a blank. Forged flanges have improved properties compared to castings and their scope is wider than cast products. The heat treatment of the flanges supplied by us complies with the required norms and standards.
Material and technical parameters of flanges when choosing GOST 12821-80
When choosing flanges, it is necessary to know the diameter of the flange Du, the pressure Ru, the steel grade from which the flange is made and the flange design.
Sometimes there are situations when the purchasing manager needs to select flanges for certain fittings and there are no flange parameters. In these cases, we recommend that you contact the engineers and technicians of our company, who will help you select the necessary sets of flanges and related materials, in accordance with the products where collar flanges serve as mating elements.
Material of supplied flanges GOST 12821-80: st.20, 09G2S, 13HFA, 12X18H10T, 10X17H13M2T.
Diameters from Du50 to Du800, pressure from Ru50 to Ru200. In the absence of the required flange design, our company will provide a service for regrinding to the required one from the existing stock.
Flange marking
Our flanges after production are marked on site with the foreseen manufacturing process.
Flange marking can be done by knurling or by impact.
The flange marking contains the decoding of the flange, the steel grade, and the metal melting number. Marking of additional inscriptions can be agreed upon individually when placing an order.
Testing and control methods for flanges according to GOST 12821-80
Product control is carried out by the department of technical quality control of products of our company. The control begins with the input control of the metal from which the products are made. After manufacturing the workpiece (forging) and heat treatment, it is checked again chemical composition metal and testing to reveal mechanical properties. At the request of the customer, we perform additional ultrasonic testing with the preparation of a test report.
After passing all the tests, the flanges are packed by the standard method on a pallet, having previously been treated with graphite grease to prevent corrosion and shipped to the buyer or to a place for storage.
Before shipment of products to the buyer from the warehouse, a visual control of the integrity of the packaging is carried out.
All of the above data are entered in the passport for the product. When purchasing our products, we issue a passport for a part, a quality certificate, additional test reports, and, if necessary and prior agreement, it is possible to issue a measurement card or drawings for the product.
How to buy collar flange GOST 12821-80
To order and purchase a collar flange, you just need to contact us, or leave a request on our e-mail, c detailed description parameters required for the flanges you need. Also on the pages of our website you can get online advice from our experts and use the feedback form.
We will help you select and complete your order with related products: gaskets for sealing, fasteners.
The price range for flanges is formed individually, we provide discounts for wholesale buyers and regular customers. Deferred payment for regular customers is possible.
RUSEVROSTAL supplies stainless collar flanges GOST 12821-80 from stock and on order. Stainless steel flange made according to the GOST 12821-80 standard - collar flange, round shape with a ledge (collar) is designed to connect pipes, capacitive equipment, shut-off and control valves, pumping and other equipment into a single system.
The size range of collar flanges of the GOST 12821-80 (GOST 12821-80) standard corresponds to the size range of stainless seamless pipes, shut-off and control valves and pipeline fittings made according to the GOST standard.
Stainless flanges GOST 12821-80 are made of various grades of steel and alloys, depending on the environment and working environment where these flanges will be used.
Steel grade:(08) 12X18H10T, 10X17H13M2T (acid-resistant), 20X23H18 (heat-resistant).
Operating pressure: from 0.1 MPa to 6.3 MPa (from 1 kgf/cm² to 63 kgf/cm²).
Working temperature: from -60°С to +600°С.
Designation and marking stainless flange:
flange 1-50-10 GOST 12821-80, where (1 is the version of the sealing surface, 50 is the nominal diameter of the flange, 10 is the allowable working pressure of this flange, GOST 12820-80 is the collar flange standard).
The minimum order of flanges is from 1 pc.
Manufacturer country: Russia, China.
Flange GOST 12821-80 types of sealing surface
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Scope of application
High working pressure up to 20 MPa, allows the use of collar flange GOST 12821-80 12x18n10t in particularly critical areas:- oil and gas and chemical industry
- defense and shipbuilding industry
- Atomic industry
- production of shut-off and control valves
- production of capacitive, pumping and other equipment
| Dimensions of collar stainless flange GOST 12821-80 steel grade 12X18H10T/10X17H13M2T for pressure Ru 10/16 |
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|---|---|---|---|---|---|---|---|---|---|---|
| DN, mm | External diameter (D), mm | Intermediate diameter axial distance (D0), mm | Fastener size (d0), mm | Collar outer diameter (Dn), mm | Internal diameter (d1), mm | Flange thickness (b), mm | flange height (h4), mm |
Number of fasteners. hole (n), pcs | Weight of one flange, kg | |
| 15 | 95/95 | 65/65 | 14/14 | 30/30 | 19/19 | 12/12 | 10/12 | 33/33 | 4/4 | 0,6/0,7 |
| 20 | 105/105 | 75/75 | 14/14 | 38/38 | 26/26 | 18/18 | 12/12 | 36/36 | 4/4 | 0,8/0,9 |
| 25 | 115/115 | 85/85 | 14/14 | 45/45 | 33/33 | 25/25 | 12/12 | 38/38 | 4/4 | 1/1,1 |
| 32 | 135/135 | 100/100 | 18/18 | 55/55 | 39/39 | 31/31 | 13/13 | 40/40 | 4/4 | 1,5/1,6 |
| 40 | 145/145 | 110/110 | 18/18 | 62/64 | 46/46 | 38/38 | 13/13 | 42/42 | 4/4 | 1,8/1,9 |
| 50 | 160/160 | 125/125 | 18/18 | 76/76 | 58/58 | 49/49 | 13/13 | 42/45 | 4/4 | 2,2/2,3 |
| 65 | 180/180 | 145/145 | 18/18 | 94/94 | 77/77 | 66/66 | 15/15 | 45/47 | 4/4 | 3,1/3,2 |
| 80 | 195/195 | 160/160 | 18/18 | 105/110 | 90/90 | 78/78 | 15/17 | 47/50 | 4/4 | 3,6/4,2 |
| 100 | 215/215 | 180/180 | 18/18 | 128/130 | 110/110 | 96/96 | 17/17 | 48/50 | 8/8 | 4,7/4,9 |
| 125 | 245/245 | 210/210 | 18/18 | 156/156 | 135/135 | 121/121 | 19/19 | 57/57 | 8/8 | 6,7/6,8 |
| 150 | 280/280 | 240/240 | 22/22 | 180/180 | 161/161 | 146/146 | 19/19 | 57/57 | 8/8 | 8/8,3 |
| 200 | 335/335 | 295/295 | 22/22 | 240/240 | 222/222 | 202/202 | 19/21 | 58/58 | 8/12 | 11,3/12 |
| 250 | 390/405 | 350/355 | 22/26 | 290/292 | 278/278 | 254/254 | 21/23 | 60/65 | 12/12 | 14,6/17 |
| 300 | 440/460 | 400/410 | 22/26 | 345/345 | 330/330 | 303/303 | 22/24 | 60/66 | 12/12 | 18,5/23 |
| 350 | 500/520 | 460/470 | 22/26 | 400/400 | 382/382 | 351/351 | 22/28 | 60/70 | 16/16 | 24/32 |
| 400 | 565/580 | 515/525 | 26/30 | 445/450 | 432/432 | 398/398 | 22/32 | 60/75 | 16/16 | 30/43 |
| 500 | 670/710 | 620/650 | 26/33 | 550/559 | 535/535 | 501/501 | 24/38 | 65/90 | 20/20 | 40/71 |
| 600 | 780/840 | 725/770 | 30/39 | 650/660 | 636/636 | 602/602 | 24/41 | 65/90 | 20/20 | 49/100 |
| 800 | 1010/1020 | 950/950 | 33/39 | 850/850 | 826/826 | 792/792 | 27/45 | 75/95 | 24/24 | 87/130 |
| 1000 | 1220/1255 | 1160/1170 | 33/45 | 1050/1060 | 1028/1028 | 992/992 | 29/49 | 80/110 | 28/28 | 120/203 |
steel grade 12X18H10T/10X17H13M2T for pressure Ru 25/40 |
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|---|---|---|---|---|---|---|---|---|---|---|
| doo, mm |
External diameter (D), mm | Intermediate diameter axial distance (D0), mm |
Fastener size (d0), mm | Collar base diameter (Dm), mm | Internal diameter (dB), mm | Flange thickness (b), mm | Gate height nick (h4), mm |
Number of fasteners. hole th (n), pcs |
Weight of one flange, kg |
|
| 15 | 95/95 | 65/65 | 14/14 | 30/30 | 19/19 | 12/12 | 14/14 | 33/33 | 4/4 | 0,8/0,8 |
| 20 | 105/105 | 75/75 | 14/14 | 38/38 | 26/26 | 18/18 | 14/14 | 34/34 | 4/4 | 1/1 |
| 25 | 115/115 | 85/85 | 14/14 | 45/45 | 33/33 | 25/25 | 14/14 | 36/36 | 4/4 | 1,2/1,2 |
| 32 | 135/135 | 100/100 | 18/18 | 56/56 | 39/39 | 31/31 | 16/16 | 43/43 | 4/4 | 1,8/1,8 |
| 40 | 145/145 | 110/110 | 18/18 | 64/64 | 46/46 | 38/38 | 16/16 | 45/45 | 4/4 | 2,1/2,2 |
| 50 | 160/160 | 125/125 | 18/18 | 76/76 | 58/58 | 49/49 | 17/17 | 45/45 | 4/4 | 2,8/2,8 |
| 65 | 180/180 | 145/145 | 18/18 | 96/96 | 77/77 | 66/66 | 19/19 | 50/50 | 8/8 | 3,8/3,8 |
| 80 | 195/195 | 160/160 | 18/18 | 110/ | 90/90 | 78/78 | 19/21 | 52/55 | 8/8 | 4,4/4,9 |
| 100 | 230/230 | 190/190 | 22/22 | 132/138 | 110/110 | 96/96 | 21/23 | 58/65 | 8/8 | 6,6/7,4 |
| 125 | 270/270 | 220/220 | 26/26 | 160/160 | 135/135 | 121/120 | 23/25 | 65/65 | 8/8 | 9,4/1,0 |
| 150 | 300/300 | 250/250 | 26/26 | 186/186 | 161/161 | 146/146 | 25/27 | 68/68 | 8/8 | 12,5/13 |
| 200 | 360/375 | 310/320 | 26/30 | 245/250 | 222/222 | 202/202 | 27/35 | 75/85 | 12/12 | 17,5/24 |
| 250 | 425/445 | 370/385 | 30/33 | 300/310 | 278/278 | 254/252 | 29/39 | 75/98 | 12/12 | 24,4/37 |
| 300 | 485/510 | 430/450 | 30/33 | 352/368 | 330/330 | 303/301 | 32/42 | 80/112 | 16/16 | 33,3/57 |
| 350 | 550/570 | 490/510 | 33/33 | 406/418 | 382/382 | 351/351 | 36/48 | 85/116 | 16/16 | 46,6/70 |
| 400 | 610/655 | 550/585 | 33/39 | 463/480 | 432/432 | 398/398 | 40/54 | 100/135 | 16/16 | 65/107 |
| 500 | 730/755 | 660/670 | 39/45 | 570/580 | 535/535 | 500/495 | 44/58 | 100/140 | 20/20 | 89/133 |
| 600 | 840/890 | 770/795 | 39/52 | 670/686 | 636/636 | 600/595 | 49/58 | 115/140 | 20/20 | 123/181 |
| 800 | 1075/1135 | 990/1030 | 45/56 | 874/908 | 826/826 | 790/795 | 55/71 | 135/190 | 24/24 | 214/344 |
| 1000 | 1315/1360 | 1210/1250 | 56/56 | 1084/1140 | 1028/1028 | 992/995 | 59/77 | 150/235 | 28/28 | 312/541 |
Dimensions in the table correspond only to GOST 12821-80 flanges
with sealing version 1
| Dimensions of stainless flange GOST 12821-80 steel grade 12X18H10T/10X17H13M2T for pressure Ru 63 |
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|---|---|---|---|---|---|---|---|---|---|---|
| DN, mm | External diameter (D), mm | Intermediate diameter axial distance (D0), mm |
Fastener size (d0), mm | Diameter at the base of the collar (Dm), mm |
Collar outer diameter (Dn), mm | Inner diameter ny (dB), mm |
Flange thickness (b), mm | Gate height nick (h4), mm |
Number of crepe holes (n), pcs | Weight of one flange, kg |
| 15 | 105 | 75 | 14 | 38 | 19 | 12 | 16 | 46 | 4 | 1,1 |
| 20 | 125 | 90 | 18 | 48 | 26 | 18 | 18 | 54 | 4 | 1,9 |
| 25 | 135 | 100 | 18 | 52 | 33 | 25 | 20 | 56 | 4 | 2,2 |
| 32 | 150 | 110 | 22 | 64 | 39 | 31 | 21 | 60 | 4 | 3 |
| 40 | 165 | 125 | 22 | 74 | 46 | 37 | 21 | 65 | 4 | 3,8 |
| 50 | 175 | 135 | 22 | 86 | 58 | 47 | 23 | 67 | 4 | 4,7 |
| 65 | 200 | 160 | 22 | 106 | 77 | 64 | 25 | 72 | 8 | 6,3 |
| 80 | 210 | 170 | 22 | 120 | 90 | 77 | 27 | 72 | 8 | 7,3 |
| 100 | 250 | 200 | 26 | 140 | 110 | 94 | 29 | 77 | 8 | 11 |
| 125 | 295 | 240 | 30 | 172 | 135 | 118 | 33 | 95 | 8 | 17 |
| 150 | 340 | 280 | 33 | 206 | 161 | 142 | 35 | 105 | 8 | 25 |
| 200 | 405 | 345 | 33 | 264 | 222 | 198 | 41 | 110 | 12 | 36,6 |
| 250 | 470 | 400 | 39 | 316 | 278 | 246 | 45 | 115 | 12 | 51 |
| 300 | 530 | 460 | 39 | 370 | 330 | 294 | 50 | 120 | 16 | 69 |
| 350 | 595 | 525 | 39 | 430 | 382 | 342 | 56 | 140 | 16 | 99 |
Dimensions in the table correspond only to GOST 12821-80 flanges
with sealing version 1
If you have any questions, please contact us in a convenient way for you.
Butt Weld Steel Flange (Collar flange) - the connecting part of pipelines, fittings, shafts, vessels, tanks, devices, etc., consisting of a disk with holes for bolts (or studs) and a characteristic axially symmetrical protrusion in the form of a truncated cone ("collar", or "neck" , neck, hub) for butt welding. Collar flange, along with a flat flange, is one of the frequently used connecting elements of pipelines. In foreign industrial terminology, the name Weld Neck Flange, or WN Flange.
Collar flange is used for hermetic connection of separate parts of pipelines high pressures or to sum up technological pipelines to tanks, vessels or apparatus. Application of collar flanges allows, without cutting the pipe (often pipes with a sufficiently thick wall), to break the connection to dismantle or modernize part of the pipeline, in this sense flange connection is "reusable". The collar (neck) transfers forces to the pipe, reducing the stress concentration at the base of the collar flange. The gradual transition of the thickness from the base of the collar to the thickness of the pipe wall in the weld ensures the reliability of the collar flange. The flange diameter matches the pipe diameter, reducing turbulence and erosion of the flange joint. used collar flange on pipelines where the nominal pressure is 0.1 - 20.0 MPa (1 - 200 kgf / cm²), and the temperature of the working medium is in the range from -253°C to +600°C.
During installation collar flange does not fit on the pipe flat flange, and is welded to it end-to-end with one weld.
Collar flanges GOST 12821-80
Collar flange production is regulated by the domestic normative and technical document GOST 12821-80 "Butt-welded steel flanges for Ru from 0.1 to 20.0 MPa (from 1 to 200 kgf / cm²). Design and dimensions." Wording on English language sounds like " Steel butt-welded flanges for P nom from 0.1 to 20.0 MPa (from 1 to 200 kgf/cm²). Design and dimensions". This document, which standardizes collar flanges, was introduced to replace GOST 12829-67, GOST 12833-67 and GOST 12835-67.
According to GOST 12815-80, 9 different versions are distinguished collar flanges: 1) collar flanges with a connecting ledge; 2) collar flanges with a ledge; 3) collar flanges with a cavity; 4) collar flanges with a spike; 5) collar flanges with a groove; 6) collar flanges with recess for lens seal; 7) collar flanges for sealing gasket of oval section; 8) collar flanges with a spike for a PTFE gasket; 9) collar flanges with a groove for a PTFE gasket.
GOST 12821-80 sets an example symbol when ordering round steel butt weld flange Dy 50 mm on RU 1.0 MPa (10 kgf / cm²) from steel 25, version 1 (with a connecting ledge):
Flange 1-50-10 St 25 GOST 12821-80,
Where:
1 - version of the collar flange;
50 - nominal bore, mm - (D y, DN);
10 - conditional pressure, kgf / cm² - (P y, PN);
St 25 - steel grade from which the collar flange is made.
The appendix to GOST 12821-80 contains a table of compliance with OKP codes (all-Russian product classifier). For example, a collar flange with the designation 1-100-2.5 has the OKP code 37 9941 4290 00, and stainless collar flange the same designation - code 37 9941-5233 05.
We produce collar flanges nominal diameters 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 500, 600,700, 800, 900, 1000, 1200, 1400, 1600, 1800 mm and above and nominal pressures: 6, 10, 16, 25, 40, 63, 100, 160, 200 kgf/cm². We will also make butt welded steel flanges other diameters according to your drawing.
Collar flanges DIN
Collar flanges according to the German DIN standard (Deutsches Institute für Normung, German Institute for Standardization). DIN collar flanges (Welding Neck Flanges) include flanges manufactured according to the following standards:
- DIN 2627 Weld Neck Flange PN400,
- DIN 2628 Weld Neck Flange PN250,
- DIN 2629 Weld Neck Flange PN320,
- DIN 2630 Weld Neck Flange PN1 and 2.5,
- DIN 2631 Weld Neck Flange PN6,
- DIN 2632 Weld Neck Flange PN10,
- DIN 2633 Weld Neck Flange PN16,
- DIN 2634 Weld Neck Flange PN25,
- DIN 2635 Weld Neck Flange PN40,
- DIN 2636 Weld Neck Flange PN64,
- DIN 2637 Weld Neck Flange PN100,
- DIN 2638 Weld Neck Flange PN160.
- DIN 86029 Hubbed Slip-on Flange PN10, DIN 86030 Hubbed Slip-on Flange PN16.
Collar flange EN
The standards published by the European Committee for Standardization are called EN. DIN EN 1092-1 specifies standards for flanges. Weld-neck flanges are of type (type, typ) 11 - Weld-neck flanges and are available for pressures PN 2.5, PN 6, PN 10, PN 25, PN 40, PN 63, PN 100.
PN (nominal pressure) - conditional pressure, kgf/cm².
Below is a table of conformity between EN 1092-1 and DIN for collar flanges. For EN 1092-1, equivalent DIN standards are specified for each nominal pressure. Collar flange types only described in EN 1092-1 but not described in DIN are marked with a "+". The symbol "-" means that there is no standard for this pressure. The underlined standard numbers are taken from DIN.
| Flange type | Weld-neck flanges(collar flanges steel welded end-to-end) | Hubbed slip-on flanges for welding(collar flanges steel welded) | Hubbed threaded flanges(threaded collar flanges) | |
|---|---|---|---|---|
| Drawing |  |
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| EN type | 11 | 12 | 13 | |
| PN | 2,5 | 2630 | - | - |
| 6 | 2631 | + | 2565 | |
| 10 | 2632 | 86029 | + | |
| 16 | 2633 | 86030 | 2566 | |
| 25 | 2634 | + | + | |
| 40 | 2635 | + | 2567 | |
| 63 | 2636 | + | 2568 | |
| 100 | 2637 | + | 2569 | 160 | 2638 | - | - |
| 250 | 2628 | - | - | |
| 320 | 2629 | - | - | 400 | 2627 | - | - |
Collar flange ASME/ANSI
According to ASME / ANSI (ASME - American Society of Mechanical Engineers - American Society of Mechanical Engineers, American National Standards Institute - American national institute standards), collar flanges are called Welding Neck and are manufactured according to ASME/ANSI B16.5 - 1996 - "Pipe Flanges and Flanged Fittings" and ASME/ANSI B16.47 "Large Diameter Steel Flange". ASME / ANSI B16.5 standardizes the production of flanges (including neck flanges) with a nominal diameter from 1/2 to 24 inches, collar flanges of large diameters (26 - 60 inches) are manufactured in accordance with the requirements of ASME / ANSI B16.47. This standard describes temperature and pressure conditions, materials, dimensions, tolerances, markings, etc.
The figure on the right shows the following symbols:
A - collar diameter for welding (neck diameter weld neck, or hub diameter at bevel);
X - collar diameter at the base (hub diameter);
Y 1 - collar length (weld neck length through hub);
C - thickness (thickness);
R is the diameter of the connecting protrusion (raised face diameter);
O - outer diameter (outside diameter);
B 1 - inner diameter of the pipe (weld neck bore);
In accordance with ASME / ANSI B16.5, flanges are classified by nominal pressure into classes (Class, allowable nominal pressure in pounds per square inch): 150, 300, 400, 600, 900, 1500, and 2500. To convert from units " class" in kgf/cm², divide the "class" value by 6. ANSI/ASME B16.47 includes classes 75, 150, 300, 400, 600, 900.
Non-standard collar flanges according to the drawing
Non-standard collar flanges, made according to the customer's drawing, are necessary if it is necessary to connect two pipelines built to different standards, or parts of pipelines of different standards.
The use of various steels for the manufacture of collar flanges
The collar flange is made by processing a cast ring billet from the following steels: 3, 20, 20FA (structural high-quality carbon), 09G2S (structural low-alloy for welded structures) - collar flanges for cryogenic temperature conditions, 13HFA; 15X5M (heat-resistant collar flanges); stainless collar flanges made of corrosion-resistant steels 20X13, 14X17H2, 08X18H10T, 12X18H10T, 06XH28MDT, 10X17H13M2T, 10X17H13M3T, 10X11H23T3MR.
