Product portfolio

HALF TUBES AND COILED HALF TUBES

Weld on half-tube profiles are used in the chemical, pharmaceutical, food and vehicle manufacturing industries for heating and cooling purposes and they find application in the fields of apparatus and vessel construction. The company Karl Theis GmbH is deemed to be the pioneer in manufacturing half tubes made of slit strips. We are thus able to implement our customers’ individual requirements on schedule and in a cost effective way.

Cylindrically bent half tubes

Cylindrically bent half tubes
Dimensions 33,7 mm
48,3 mm
60,3 mm
76,1 mm
88,9 mm
114,3 mm
139,7 mm
Special profiles 114,3 mm (with reduced height)
100 / 30 mm
142 / 42 mm
Further products on request
Wall thickness 2,0-6,0 mm
Manufacturing lengths up to max. 100 m without transverse joint
Individual solutions Our in-house tool manufacturing facilities enable us to manufacture customized solutions/special productions according to our customers’ specifications.
Welding Preparation Without
Longitudinal edges 45° (internal/external)
on request
Several cylindrically bent half pipes in different dimensions, grades and bending diameters.
cylindrically bent special profile (dimension Ø 76,10 mm, height reduced profile)
Inside cylindrically bent half pipes for the mounting to the inside of a cylindrical vessel wall
Conically and cylindrically bent half pipes, including reservals (in the area of the nozzle) tack welded on a provided vessel.
Conically and cylindrically bent half pipes (seen on an entire component)

Stefan Becker

E-Mail: s.becker[at]theis-tubes.com

Karl Theis GmbH
Breite Straße 11 | 57076 Siegen

Telephone: +49 (0) 271 / 7 72 85 - 28
Telefax: +49 (0) 271 / 7 72 85 - 99

Straight half tubes

Straight half tubes
Dimensions 33,7 mm
48,3 mm
60,3 mm
76,1 mm
88,9 mm
108,0 mm
114,3 mm
Special profiles 114,3 mm (with reduced height)
100 / 30 mm
Wall thickness 2,0-6,0 mm
Manufacturing lengths According to customer’s specifications up to max. 20 m
Individual solutions Our in-house tool manufacturing facilities enable us to manufacture customized solutions/special productions according to our customers’ specifications.
Welding Preparation Without
Longitudinal edges 45° (internal/external)
on request
straight half pipes (dim.: 60,30 x 3,00 mm, grade: 1.4301/AISI304) adapted into 2 pcs collector half, pipes (dim.: 114,30 x 3,00 mm, grade: 1.4301/AISI304) on a horizontal vessel.
several packages of straight half pipes in fix lengths according customer requirements

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Conically bent half tubes

Conically bent half tubes
Dimensions 33,7 mm
48,3 mm
60,3 mm
76,1 mm
88,9 mm
114,3 mm
Wall thickness 2,0-6,0 mm
Types of execution 180° segments as loose types and/or tack-welded on bottoms/cones and vessels
Individual solutions Our in-house tool manufacturing facilities enable us to manufacture customized solutions/special productions according to our customers’ specifications.
Welding Preparation Without
Longitudinal edges 45° (internal/external)
on request
tack welded conical formed half pipes (dim.: 88,90 x 4,00 mm, grade: P265GH/SA516 Grade 60) including half pipes between the interspaces of the tubular feets on a torispherical head.
tack welded conical formed half pipes (dim.: 60,30 x 3,00 mm, grade: 1.4541/AISI321) on a torispherical head.
partial half pipe section (dim.: Ø 76,10 x 4,00 mm, grade: 2.4605/Alloy 59) tacked on bottom half pipes.
half pipe section realized with reversal bows.
half pipe reversals adapted with 45° mitre cuts
several half pipe struts  bend on the contour of the bottom/vessel,  adapted into the half pipe rings
2,5 turns of half pipes (dim.: 48,30 x 3,00 mm, grade: 1.4571) tacked on an asymmetrical cone
7 turns conical formed half pipes (dim.: 76,10 x 3,00 mm, grade: 1.4404/AISI316L), necessary jumps done by half pipe with mitre cuts
various, adapted to the necessary geometry, half pipes tacked on a supplied horizontal tank
tack welded conical formed half pipe (dim.: 60,30 x 3,00 mm, grade: 1.4301/AISI304) on a supplied cone.

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Materials used in the field of half tubes:

stainless steel:
1.4301 (TP304), 1.4307 (TP 304L), 1.4404 (TP 316L), 1.4541 (TP 321), 1.4571 (TP 316 Ti), 1.4462 (S31803), 1.4539 (904L), 1.4876 (Alloy 800)

nickel base alloys:
2.4602 (Alloy C22), 2.4605 (Alloy 59), 2.4610 (Alloy C4)

titanium:
3.0725 (titanium size 3)

carbon steel:
P265GH (SA 516 size 60), P275NH, P355NH, S355