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Pipe Expansion Joints
THREADED PIPE EXPANSION JOINTS
-
Working pressure
PN16 (Optional /
Opsiyonel; PN25, PN40) -
Working temperature
-10/
+100ºC - Connection type Threaded - Dişli
-
Nominal diameter
DN 15 (1/
2") - DN 50 (2") - Design standard EJMA
-
Bellows material
AISI 304 Stainless Steel - Paslanmaz Çelik (Optional /
Opsiyonel; AISI 316L/ 316Ti/ 321) -
Connection material
ST37.2 Carbon Steel - Karbon Çelik (Optional /
Opsiyonel; AISI 316L/ 316Ti/ 321)
Documents
Product catalog page
PDF 2 page(s) 1.469 KB EN 01.08.2026
What it does
Pipe Expansion Joints
Pipe expansion joints (thermal expansion joints) are compact components used—particularly in the riser lines of high-rise buildings and in long central heating systems—to dampen axial expansion and contraction caused by temperature changes. Typically featuring a decorative outer protective casing and an inner liner, these products prevent bending and twisting in the pipe line, ensuring the system remains in a straight line. Thanks to their space-saving designs, they are widely preferred in shaft interiors and exposed pipe runs where aesthetic appearance is a priority, to prevent pipes from expanding and causing noise or leaking at connection points.
Material
Material specifications
| No | Part name (TR) | Part name (EN) | Qty | Material |
|---|---|---|---|---|
| 1 | Threaded Connection / Dişli Bağlantı | Threaded Connection / Dişli Bağlantı | 1 | St. 37.2 |
| 2 | Threaded Connection / Dişli Bağlantı | Threaded Connection / Dişli Bağlantı | 1 | St. 37.2 |
| 3 | Outer Pipe / Kaver | Outer Pipe / Kaver | 1 | St. 37.2 |
| 4 | Bellow / Körük (Double Ply / Çift Kat) | Bellow / Körük (Double Ply / Çift Kat) | 1 | AISI 304/321 |
| 5 | Inner Sleeve / Layner | Inner Sleeve / Layner | 1 | ST 37.2 |
| 6 | Pin / Pin | Pin / Pin | 1 | St. 37.2 |
| 7 | Segment / Segman | Segment / Segman | 1 | St. 37.2 |
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