Seamless elbows – made from seamless Tubes

produced according to EN 10253-2/-4 – DIN 2605 – ASME B16.9

Our product range includes seamless elbows with thick walls, special materials, special center to center distances, elbows with extended tangents as well as various angles (elbows in 180°, 90°, 45°, 24°, etc.).

We are particularly specialized in the manufacture of type B elbows according to the norm EN 10253-2 or 10253-4 or part 2 elbows according to DIN 2605. Our products are used in refineries, power plants, oil drilling platforms, heat exchangers, for mechanical engineering and so on.

Our products are manufactured according to two different manufacturing processes. For one, we manufacture elbows according to the ÔÇťhamburger processÔÇŁ. Here the tube is pressed over a curved inner mandrel. The second manufacturing method is a hot forging process. In this procedure, the elbow is pressed into the appropriate shape by a die.

We supply elbows made of carbon steel, high alloyed steel or even stainless steel. Our extensive experience also in terms of heat treatment gives us the possibility to cover a wide range of materials. A list of materials can be found in the materials section.

Our production process is subject to stringent quality controls. During the manufacturing process, dimensional checks are carried out to detect early errors. Our company is supervised by T├ťV Nord and is ISO9001 certified.

dimensional range

Outside Diameter: 14,0 mm -219,1 mm
Wall thickness: from 1 mm to 50 mm, depending on the outside diameter
Angle: from 7┬░ to 180┬░, depending on the outside diameter
Types of elbow: 2D, 3D, 5D, long radius, short radius – 2D, 3D, 5D, long radius, short radius – see┬áCenter to center┬ádistance for further options
Standard specification: EN10253 Typ A and B, DIN 2605 Part 1 and 2, ASME B16.9, production according to customer specification.
tolerances In general, we manufacture according to the common tolerances of the pipe bend standards. However, it often happens that we also manufacture pipe bends with tighter tolerances. Here we have the possibility to produce elbows with a bend diameter of +/- 1mm.
Welding bevel: according to EN10253, EN9692-1, DIN2559, ASME B16.25, according to technical drawing

What is a pipe bend?

A pipe bend is a pipe fitting that has the purpose of changing the direction of piping systems. There are different types of pipe bends. They differ in outer diameter, wall thickness, bend diameter, angle and material. There is also a distinction between welded pipe bends made of half-shells and pipe bends made of seamless pipe. Pipe bends are used in power plant construction, mechanical engineering, heat exchanger and plant construction etc..

Manufacturing steps for the production of a welded pipe bend

Rohrbogen - Hamburger Verfahren

In the “Hamburger Verfahren” the tube is hot formed over a mandrel shaped like an alphorn.

Pipe elbow produced in an die

During the hot forging process a tube section is pressed into a die shaped in the negative form of the finished elbow.

Rohrbogen im Zuschnitt

After forming the elbow is cut to the required angle. We can cut any angle from 7┬░ to 180┬░.

With our versatile range of equipment we are able to provide elbows with a wide variety of welding bevels. These can either be machined to standard specifications or custom-made to technical drawings.

In the last step of the production process the surface of the elbow is inspected and any surface irregularities corrected. The elbows can optionally be sandblasted, pickled or coated.

Upon completion the elbow undergoes material testing as specified or required and is checked for dimensional accuracy. A mark is mechanically or chemically stamped onto each elbow.

When the finished elbows have passed the final inspection, they are securely packed for shipping.

The goods can optionally be sent by express delivery, by standard dispatch or with seaworthy packing for export. Please contact us about your requirements.

 

Portfolio

Elbow materials

Over the years we have become expert at forming elbows from carbon steel, high-alloy steel and also stainless steel. We can make elbows from the materials listed below.

EN / DIN()

  • P235GHTC1/2 (St 35.8 I/ III), P265GH, S355J2H
  • 16Mo3 (15Mo3), 10CrMo9-10 (10CrMo910), 13CrMo4-5 (13CrMo44)
  • X11CrMo5, X11CrMo9-1, X20CrMOV11-1, X10CrMoVNb9-1, X10CrWMoVNb9-2, 7CrMoVTiB10-10
  • P215NL (TTST35N/V), 12Ni14 (10Ni14)
  • P355N (StE355), P355NH (WStE355), P355NL1 (TStE355), P355NL2
  • L290NB (StE 290.7), L360NB (StE 360.7)
  • 1.4301, 1.4306, 1.4362 (Lean Duplex), 1.4401, 1.4404, 1.4435, 1.4436, 1.4439, 1.4462 (Duplex), 1.4466 (Super Duplex), 1.4501, 1.4539, 1.4541, 1.4550, 1.4571 1.4841, 1.4878, , 1.4876, 1.4952, 1.4835, 1.4877, 1.4910

ASME

  • WPA, WPB, WPC, WP1, WP5, WP9, WP11, WP12, WP22, WP32/27, WP91, WP92, WP304, WP304 H, WP304L, WP310, WP316, WP316L, WP316TI, WP321, WP347, WP347H
  • WPL 3, WPL6, X42, X52, WPHY52, WPHY60
  • S30815, S31000, S31050, S31500, S31726, S31803, S32760, N08904
  • Alloy 800H, DMV310N

Wir sind sehr daran interessiert, immer wieder neue Materialien zu verarbeiten. Sprechen Sie uns gerne dazu an.

Eine ausf├╝hrliche Werkstoffliste k├Ânnen Sie unter folgendem Punkt herunterladen:┬áWerkstoffliste

Standards for fittings and pipe elbows

In the area of fittings and elbows, various standards are valid and are applied by us. We also manufacture our elbows according to customer specifications.

EN 10253-2

EN 10253-2 (Edition 2008)

This is the current standard for butt welding pipe fittings of non-alloyed and ferritic alloyed steels with specific inspection requirements. Several DIN standards for various fittings have been combined into a European standard. For us, the elbow part is essential here. We supply elbows according to the types 2D, 3D, 5D and also many other radii in between. The EN 10253-2 also includes a part for elbows with a full degree of utilization (Type B). “Type B” elbows have a significantly reinforced wall thickness against the wall thickness on the inside of the elbow. The reason for this is that the the inside wall of the fitting is the most stressed part of an elbow.

EN 10253-4

EN 10253-4 (Edition 2008)

This standard deals with fittings for the welding of austenitic and austenitic-ferritic (duplex) steels with special test requirements. For the most part, this standard complies with EN 10253-2. Here, for example, there are sporadically different bending radii compared to the EN10253-2. Our team will inform you about the differences if you need further information.

DIN 2605

DIN 2605

The DIN 2605 is the former elbow standard which has now been replaced by the EN10253. There are other wall thicknesses for the elbows with a full degree of utilization (Type 2) compared to the new standards. Also, this standard is not as extensive as the EN10253 and it contains only a part about elbows and no other fittings.

ASME B16.9

ASME B16.9

This standard includes all technical delivery conditions for fittings manufactured according to ASME Standard. Among other things, there is a part for elbows.

Center to center distance

We also manufacture elbows outside the standard bending diameter 2D, 3D, 5D. Our well-set tool portfolio allows us to offer many special dimensions in the range up to 219mm outside diameter.

We have already produced all the elbows with the center to center distances shown in the table below. Please contact us if you need other center to center distances.

outer diameter center to center
10 40
14 40
16 32
18 2
20 32 – 50 – 53
21,3 35 – 39 – 50 – 55 – 56 – 76 – 85 – 87 – 300
22 76 – 90 – 220
25 42 – 50 – 55 – 60 – 68 – 88 – 90 – 106 – 120 – 180
26,9 48 – 50 – 51 – 57,5 – 58 – 60 – 64 – 68 – 76 – 78 – 80 – 85 – 95 – 100 – 105 – 115 – 117 – 135 – 140 – 170 -200 – 380
28 57 – 65 – 67 – 70 – 84 – 96
30 50 – 58 – 67 – 68 – 70 – 75 – 90 – 100 – 110 – 125 – 136
31,8 8 – 50 – 55 – 60 – 65 – 70 – 71 – 73 – 76 – 78 – 80 – 90 – 100 – 110 – 120 – 127 – 135 – 160 – 200 – 210 – 225
32 50 – 56 – 65
33,7 45 – 50 – 53 – 56 – 60 – 63 – 70 – 75 – 76 – 79 – 80 – 90 – 100 – 120 – 145 – 250 – 270 – 480
35 51 – 76 – 90 – 90 – 93 – 120 – 150 – 200
38 50 – 54 – 55 – 59 – 60 – 64 – 65 – 70 – 75 – 75,5 – 76 – 77 – 79 – 80 – 81 – 85 – 90 – 91 – 93 – 95 – 96 – 100 – 102,6 – 110 – 114 – 115 – 118 – 120 – 130 – 133 – 140 – 150 -160 – 165 – 166 – 170 – 186 – 198 – 226 – 290 – 380
40 95 – 103 – 110 – 370
42,4 60 – 62 – 64 – 75 – 77 – 85 – 90 – 92 – 96 – 98 – 100 – 114 – 126 – 130 – 140 – 145 – 150 – 160 – 185 – 187 – 370
44,5 68 – 70 – 80 – 84,5 – 90 – 100 – 102 – 105 – 107 – 110 – 111 – 115 – 140 – 141 – 160 – 195 – 199 – 272
48,3 76 – 78 – 80 – 85 – 91 – 96 – 100 -102 – 114 – 120 – 150 -152,4 -160 -170 -200 -215 -219 -225 -230 -270 -498
51 65 – 76 – 90 – 93 – 95 – 102 – 105 – 110 – 114 – 122 – 127 – 130 – 135 – 139,7 – 152,4 – 160 – 185 – 230 – 245
54 100 – 108 – 145 – 195
57 85 – 105 – 107 – 115 – 132 – 144 – 150 – 155 – 168 – 170 – 180 – 185 – 205 – 208 – 225 – 255
60,3 76,2 – 80 – 97,5 – 102 – 110 – 114,3 – 120 – 132 – 150 – 152 – 155 – 157 – 168 – 180 – 190 – 200 – 203 – 215 – 218 – 234 – 244 – 270 – 280 – 480 – 500 – 700 – 800
63,5 82,5 – 93 – 110 – 115 – 118 – 128 – 155 – 165 – 230 – 285 – 420
70 100 – 110 – 125 – 130 – 150 – 161 – 184 – 188 – 190 – 255 – 323 – 330
73 127 – 155
75 190
76,1 126 – 140 – 154 – 175 – 176 – 190 – 194 – 190 – 210 – 274 – 280 – 281 – 300 – 350
80 157 – 218 – 320
82,5 127 – 155 – 158 – 160 – 215 – 229 – 350 – 380
85 233
88,9 115 – 116 – 152 – 156 – 160 – 165 – 175 – 228 – 325 – 330 – 370 – 410
100 266
101,6 152 – 178 – 190 – 194 – 267 – 300 – 360 – 380 – 475
102 252 – 500
106 289
108 200 – 203 – 285 – 400 – 500 – 505
114,3 204 – 210 – 232 – 270- 304 – 440 – 540
121 225 – 240 – 304 – 340 – 350 – 564
127 215- 235 – 277 – 350 – 470 – 600
133 250 – 362 – 500 – 625
139,7 254 – 265 – 380 – 500 – 540 – 660
152 285 – 430
159 300 – 432
168,3 304 – 458
177,8 500
193,7 540
219,1 203 – 305

Fittings

Zus├Ątzlich zu unserem Programm bieten wir an:

Fittings aus Schmiedeteilen oder Vollmaterial gefertigt:

Rohrbogen

  • AD 14,0 – 219,1 mm
  • Wand 1,0 – 50,0 mm
  • DIN 2605 Teil 1 u. 2
  • DIN 2609
  • EN 10253-2 Typ A u. B
  • EN 10253-4 Typ A u. B
  • ASTM/ASME

Rohrh├╝lsen

  • gem├Ą├č Zeichnung
  • gem├Ą├č Vorgaben

Reduzierst├╝cke

  • DIN 2616 Teil 1 u. 2
  • EN 10253-2 Typ A u. B
  • EN 10253-4 Typ A u. B
  • exzentrisch
  • konzentrisch
  • gem├Ą├č Zeichnung

T-St├╝cke

  • DIN 2615 Teil 1 u. 2
  • EN 10253-2 Typ A u. B
  • EN 10253-4 Typ A u. B
  • gleicher Abzweig
  • reduzierter Abzweig
  • gem├Ą├č Zeichnung