Reinforcement connection sleeve precision steel pipe

Process: Cold drawing, cold rolling, stress relief annealing
Surface: The inner wall is regular without peeling or burrs
Ra：≤1.6‑3.2μm
Material: Common 45 #, 20CrMo
Specification: Outer diameter 28-65mm, wall thickness 4-12mm customizable

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OD*WT（mm）

22*4 24*4 27*5 29*5 32*7 35*7 44*8 50.5*10 56.5*11 Custom Specs

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Product Detail

Product Overview：

Steel reinforcement connection sleeve steel pipe is used to manufacture steel reinforcement connection sleeves. Generally produced with 45 # steel, it has strong hardness and is widely used for connecting steel bars in buildings. It has the characteristics of high hardness and strength, and is not easily deformed. It can also be used for mechanical processing and support pillars. Features: 1. Suitable for the construction of steel bar connections in reinforced concrete structures of various structures that can withstand bidirectional tensile and compressive forces; 2. Save materials and energy, not limited by the composition and type of steel bars; 3. Can be connected in all directions; 4. Pre production is possible, factory operation is carried out without occupying the construction period, and construction is carried out 24/7; 5. Easy and fast operation, fast construction speed, and can shorten the construction period.

Product List
Product Name:	45 # steel bar connection sleeve steel pipe \| seamless steel pipe
Product Name:	Precision steel bar connection sleeve seamless steel pipe
Product Name:	Cold rolled annealed steel bar connecting sleeve steel pipe \| Seamless pipe
Product Name:	National standard steel bar connection sleeve steel pipe \| seamless steel pipe
Product Name:	Non standard steel bar connection sleeve steel pipe \| seamless steel pipe

Parameter range
Outer diameter	Φ18mm - Φ 85mm (compatible with Φ 12-40mm steel sleeve)
Wall thickness	1.2mm‑18mm
Standard length	1‑12m， Support short cut, fixed length cutting, and chamfering at both ends
Outer diameter accuracy	Maximum ± 0.03mm
Executive Standards	ASTM A519, EN 10305-1, DIN 2391, JIS G3445, GB/T 3639
Non-standard customization	Special wall thickness, customized inner hole, precision tolerance, heat treatment, cutting and chamfering can all be customized

Common specification table
Corresponding steel bar diameter (mm)	Φ12	Φ14	Φ16	Φ18	Φ20	Φ22	Φ25	Φ28	Φ32	Φ36
Outer diameter of steel pipe (mm)	22	24	27	29	32	35	39.5	44	50.5	56.5
Common wall thickness (mm)	4.0、5.0	4.0、5.0	4.5、5.0、6.0	4.5、5.0、6.0	5.0、6.0、7.0	5.0、6.0、7.0	5.5、6.0、7.0、8.0	6.0、7.0、8.0、9.0	7.0、8.0、9.0、10	8.0、9.0、10、11

Optional tolerance range
Tolerance control	Optional manufacturing process
Tolerance ≤ 0.05 mm	Cold rolling
Tolerance ≤ 0.10 mm	Cold rolling
Tolerance ≤ 0.30 mm	Cold drawing \| Cold rolling
Tolerance ≤ 0.50 mm	Cold drawing \| Hot rolling
Tolerance ≤ 1.00 mm	Hot rolling \| Hot expanding

Outer diameter tolerance (annealed blank)
Outer diameter (mm)	Outer diameter deviation (mm)
4‑30	±0.20
30‑40	±0.30
40‑50	±0.40
50‑65	±0.50

Wall thickness tolerance
Project	Bias
Wall thickness S	± 10% S, minimum ± 0.10mm

Geometric tolerance
Project	Indicator
Ovalness	≤ 80% outer diameter tolerance
Straightness	≤1.0 mm/m

Universal in the sleeve industry: the tolerance for annealing state is relaxed by about twice

If the outer diameter tolerance of the purchased cold hard material (+C) is reduced by half, for example: ≤ 30: ± 0.10mm.

Optional delivery status
Oil removal from oil pipes	Annealing and straightening	Steel pipe corrosion prevention
Steel pipe threading	Length cut-to-length	Steel pipe coating
Steel pipe cap	Exquisite bundling	Beveling

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Product Detail

Product Overview：

Product List
Product Name:	45 # steel bar connection sleeve steel pipe \| seamless steel pipe
Product Name:	Precision steel bar connection sleeve seamless steel pipe
Product Name:	Cold rolled annealed steel bar connecting sleeve steel pipe \| Seamless pipe
Product Name:	National standard steel bar connection sleeve steel pipe \| seamless steel pipe
Product Name:	Non standard steel bar connection sleeve steel pipe \| seamless steel pipe

Parameter range
Outer diameter	Φ18mm - Φ 85mm (compatible with Φ 12-40mm steel sleeve)
Wall thickness	1.2mm‑18mm
Standard length	1‑12m， Support short cut, fixed length cutting, and chamfering at both ends
Outer diameter accuracy	Maximum ± 0.03mm
Executive Standards	ASTM A519, EN 10305-1, DIN 2391, JIS G3445, GB/T 3639
Non-standard customization	Special wall thickness, customized inner hole, precision tolerance, heat treatment, cutting and chamfering can all be customized

Common specification table
Corresponding steel bar diameter (mm)	Φ12	Φ14	Φ16	Φ18	Φ20	Φ22	Φ25	Φ28	Φ32	Φ36
Outer diameter of steel pipe (mm)	22	24	27	29	32	35	39.5	44	50.5	56.5
Common wall thickness (mm)	4.0、5.0	4.0、5.0	4.5、5.0、6.0	4.5、5.0、6.0	5.0、6.0、7.0	5.0、6.0、7.0	5.5、6.0、7.0、8.0	6.0、7.0、8.0、9.0	7.0、8.0、9.0、10	8.0、9.0、10、11

Optional tolerance range
Tolerance control	Optional manufacturing process
Tolerance ≤ 0.05 mm	Cold rolling
Tolerance ≤ 0.10 mm	Cold rolling
Tolerance ≤ 0.30 mm	Cold drawing \| Cold rolling
Tolerance ≤ 0.50 mm	Cold drawing \| Hot rolling
Tolerance ≤ 1.00 mm	Hot rolling \| Hot expanding

Outer diameter tolerance (annealed blank)
Outer diameter (mm)	Outer diameter deviation (mm)
4‑30	±0.20
30‑40	±0.30
40‑50	±0.40
50‑65	±0.50

Wall thickness tolerance
Project	Bias
Wall thickness S	± 10% S, minimum ± 0.10mm

Geometric tolerance
Project	Indicator
Ovalness	≤ 80% outer diameter tolerance
Straightness	≤1.0 mm/m

Universal in the sleeve industry: the tolerance for annealing state is relaxed by about twice

If the outer diameter tolerance of the purchased cold hard material (+C) is reduced by half, for example: ≤ 30: ± 0.10mm.

Optional delivery status
Oil removal from oil pipes	Annealing and straightening	Steel pipe corrosion prevention
Steel pipe threading	Length cut-to-length	Steel pipe coating
Steel pipe cap	Exquisite bundling	Beveling