KRS-21 PN 16

Uni. Flanged With Tierods

Lateral Expansion Joints are expansion elements designed to absorb lateral movements, created by combining one or two angular expansion joints in a special configuration. These joints effectively control thermal expansion occurring in a plane perpendicular to the axial direction of the pipeline, thereby maintaining the structural integrity of the system.

In lateral expansion joints, the amount of expansion that can be absorbed increases proportionally with the distance between the bellows. This feature offers flexible solutions in system design and allows for customized applications tailored to different expansion requirements.

These types of expansion joints deliver high performance in systems where significant lateral movement occurs. In particular, system designs that incorporate multiple lateral expansion joints offer some of the most effective and safest solutions for absorbing thermal expansion over long distances.

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Technical Information

Standard Production: AISI 321 – DIN 1.4541
Custom Production: AISI 304 (DIN 1.4541), AISI 309 (DIN 1.4828), AISI 316 (DIN 1.4401), AISI 316 Ti (DIN 1.4571), etc.

Design Pressure: 16 BAR
Design Temperature: –196 to +550 °C

Standard Flange: Rst 37-2 (DIN 1.0038)
Custom Flange: Stainless Steel according to DIN – BS – EN – ANSI standards, etc.

Standard Hinge: Rst 37-2 (DIN 1.0038)
Custom Hinge: AISI 304 (DIN 1.4541), AISI 309 (DIN 1.4828), AISI 316 (DIN 1.4401), AISI 316 Ti (DIN 1.4571), etc.

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Technical Drawing

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Applications

Lateral expansion joints absorb lateral movements that occur in piping systems, thereby reducing stress and vibration-induced noise within the system. They are reliably used in all types of machinery, engines, pumps, industrial process lines, exhaust systems, gas and water pipelines, as well as in potable water applications.

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Painting Information

All bellows, hinge, and flange components are coated with a special protective paint against corrosion, regardless of size. This coating ensures long-term durability, especially in systems exposed to outdoor environmental conditions. Surface treatments are meticulously applied in full compliance with quality and safety standards.

Attention Attention

Special Note

Design temperatures can be increased up to +950 °C upon request. For special operating conditions, please contact our technical team. For flange dimensions, refer to the “Useful Technical Tables” section. Product weights are subject to a tolerance of ±10%.

Diameter Length Inner Outer Tierod Outer Diameter Lateral Movement +/- Lateral Spring Rate Bellows Effective Area Flange Outer Ø Flange Center Ø Flange Thickness Flange Hole Number Hole Ø Approx. Weight
25 130 36 45 175 12.5 38 12 115 85 16 4 14 3.8
32 140 44 53 200 12.5 42 18 140 100 16 4 18 4.1
40 150 50 62 210 12.5 45 24 150 110 16 4 18 4.6
50 155 61 77 225 10.5 46 28 160 125 16 4 18 6.5
65 160 77 97 245 10.5 58 35 180 145 18 4 18 8.0
80 170 90 115 270 9.5 104 82 220 160 20 8 18 9.6
100 175 117 146 290 9.5 131 134 220 180 20 8 18 12.1
125 195 145 170 335 7.5 341 192 250 210 22 8 18 15.9
150 225 169 199 375 7.5 359 265 250 240 22 8 24 17.8
200 245 220 254 440 7.5 371 442 340 295 24 12 22 24.5
250 250 275 315 505 7.5 833 683 405 355 26 12 26 35.2
300 280 328 395 570 6.5 1761 1019 460 410 28 12 30 51.2
350 300 365 419 630 6.5 2259 1205 520 470 30 16 32 70.9
400 290 410 476 700 6.0 3221 1538 580 525 32 16 34 94.7
450 300 460 526 760 5.5 4528 1897 640 585 32 20 36 125.5
500 300 508 569 850 5 5879 2273 715 650 34 20 40 156.6