Special Pieces

Steeltrade designs and manufactures special components tailored to customer requirements. Our production processes are certified by leading international institutes, including RINA, UKAS, and IQNET, ensuring compliance with the highest quality standards.

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Here some examples of our Special Pieces

PRODUCTS	DIMENSIONS	CARBON STEEL MATERIALS	ALLOY STEEL MATERIALS	STAINLESS STEEL MATERIALS	SPECIAL ALLOY
Long radius Elbows (3D/5D/7D/10D e special radius)	On request	ASTM A234 WPB ASTM A234 WPC ASTM A420 WPL6 WPHY all materials grade EN Standards	ASTM A234 WP1 - WP11 - WP12 - WP22 WP5 - WP9 - WP91 - WP92 EN Standards	ASTM A403 WP304/304L/304H ASTM A403 WP321/321H ASTM A403 WP347/347H ASTM A403 WP316L/316H ASTM A403 WP310S EN Standards	DUPLEX - SUPER DUPLEX INCONEL - INCOLOY MONEL - HASTELLOY TITANIUM
Swivel Flanges, Anchor, Compact and forged special components	On request	ASTM A105 - ASTM A350 LF2/ ASTM A694 ALL MATERIAL GRADES	ASTM A182 F1 - F11 - F12 - F22 - F5 - F9 - F91	ASTM A182 F304/304L/304H ASTM A182 F321/321H ASTM A182 F347/347H ASTM A182 F316/316L/316H ASTM A182 F310/310H	DUPLEX - SUPER DUPLEX INCONEL - INCOLOY MONEL - HASTELLOY TITANIUM

PROPERTIES	DESCRIPTION	CARBON STEEL
Type	INSULATING JOINTS, Monolothic Type	ASTM A105 - ASTM A350 LF2/ ASTM A694 F42 - F52 - F60 - F65 - F70
Design Standards	ASME B 31.3 - ASME B 31.4 - ASME B 31.8 - ASME VIII D.I a.2
Pressure Range (BarG)	from 19 to 690
Temperature Range (°C)	Standard application: from 0 to 90° C – Special Applications - from 173 to 180°C
RATING (ASME/ANSI #) Class	from 150 to 2500 "ASA" - from 3000 to 10000 "API"

Special Components – Traps

THERMODYNAMIC STEAM TRAPS

Series: TTD50 from 1/4” to 4” max rating 800Working Differential Pressure:from min 0.2 bar to max 50 barHow

How it works:

1. The disc is free and rests on the housing; in the steam trap there is no fluid of any kind.

2. Start-up: when the condensate begins to circulate, the disc is prevented from adhering to the housing, making the steam trap discharge the excess condensate.

3. As the system heats up, steam begins to arrive, traveling faster than the condensate due to the effect of Bernoulli’s principle; a reduction in pressure is generated inside the housing, forcing the disc to adhering to it and trapping the steam inside.

4. When the condensate arrives, the speed of flow will reduce, releasing the disc from the housing and allowing the steam trap to discharge the excess condensate.

HIGH PRESSURE THERMODYNAMIC TRAPS

Series: TTD100 – TTD150from ¼” to 4” max rating 1500Working Differential Pressure:from min 1 bar to max 150 bar

How it works:

1. The disc is free and rests on the housing; in the steam trap there is no fluid of any kind.

2. Start-up: when the condensate begins to circulate, the disc is prevented from adhering to the housing, making the steam trap discharge the excess condensate.

3. As the system heats up, steam begins to arrive, traveling faster than the condensate due to the effect of Bernoulli’s principle; a reduction in pressure is generated inside the housing, forcing the disc to adhering to it and trapping the steam inside.

4. When the condensate arrives, the speed of flow will reduce, releasing the disc from the housing and allowing the steam trap to discharge the excess condensate.

INVERTED BUCKET STEAM TRAPS

Series: TIBA – TIBB – TIBC- TIBD – TIBEfrom ½” to 6” max rating 1500Working Differential Pressure:from min 0.1 bar to max 80 bar

How it works:

1. The bucket is placed on the base, the shutter is opened; in the steam trap there is no fluid of any kind.

2. Start-up: when the condensate begins to circulate, the bucket is prevented from floating and the steam trap eliminates the excess condensate.

3. As the system heats up, the condensate reduces and steam starts to arrive, accumulating inside the vessel, trapped under the inverted bucket, which allows it to float on the condensate and keep the shutter closed.

4. As the steam condenses, the bucket sinks, returning to the base of the vessel where it opens the escape valve, permitting the internal pressure to discharge the accumulated condensate.

THERMOSTATIC CAPSULE OR BIMETALLIC STEAM TRAPS

Series: TSC22 – TSB25 from ¼” to 2½” max rating 300 Working Differential Pressure: from min 0.2 bar to max 25 bar

How it works:

1. The membrane inside the capsule, which is attached to the housing, is raised.

2. Start-up: when the condensate begins to circulate, the capsule is prevented from reacting to the low temperature, keeping the membrane and the shutter in the open position.

3. As the system heats up, the condensate reduces and steam begins to arrive, heating the fluid inside the capsule and expanding its volume.The thrust this generates, presses the shutter onto the housing, blocking the flow and trapping the steam.

4. As more condensate accumulates, the fluid inside the capsule cools, making the membrane contract, opening the housing and discharging the excess condensate.