Mechanical characteristics
Extreme load stability through design and material strength
Because of its glass structure, the specially developed glass fibre composite is a high-strength reinforcement. The seamless design gives the liner additional strength. This manufacturing method is based on a concept developed and patented by Brandenburger in the early 1990s.
The high strength and seamless design provides Brandenburger liner products with excellent load stability for a comprehensive range of mechanical load conditions.
The glass fibre composite has been designed for seamlessness and excellent expansibility (> 15%). The undersized liner is expanded to fit the pipe's inner diameter, with no wrinkling even if the pipe has a large diameter tolerance.
With both short-time bending Young modules of at least 7500 N/mm2 and 10800 N/mm2, Brandenburger GFRP pipe liners feature outstanding mechanical characteristics that ensure high load stability and durability.
Overview short-time bending Young modulus of different types of pipe liners
Overview Inliner wall thickness
Old pipe condition II according ATV-M 127, Part 2 (01/2000)
Circular profile: local imperfection =2.0%, ovalisation=3.0%, annular gap=0.43%
Standardized egg-shaped profile: local imperfection related to spring line radius=0.8%, ovalisation related to the crown radius=3%, annular gap related to the crown radius=0.43%
| Groundwater level above (liner) invert | 1.5m | 3.0m | |||
| DN (old sewer) | BBplus 75 | BBplus 120 | BBplus 75 | BBplus 120 | |
| 200 | 1.6 mm | 1.3 mm | 1.9 mm | 1.6 mm | |
| 300 | 2.3 mm | 1.9 mm | 2.9 mm | 2.3 mm | |
| 400 | 3.1 mm | 2.5 mm | 3.8 mm | 3.1 mm | |
| 450 | 3.5 mm | 2.9 mm | 4.3 mm | 3.5 mm | |
| 500 | 4.0 mm | 3.1 mm | 4.8 mm | 3.9 mm | |
| 600 | 4.8 mm | 3.9 mm | 5.7 mm | 4.6 mm | |
| 800 | 6.1 mm | 4.9 mm | 7.8 mm | 6.3 mm | |
| 1000 | 7.6 mm | 6.1 mm | 9.6 mm | 7.8 mm | |
| 400/600 | 5.9 mm | 4.7 mm | 7.6 mm | 6.1 mm | |
| 600/900 | 8.5 mm | 6.8 mm | 11.2 mm | 9.0 mm |
Values
| Eshort-time, 5%quantil: | 7500 (N/mm2) | 10800 (N/mm2) | |||
| δbz, short-time, 5%quantil: | 180 (N/mm2) | 230 (N/mm2) | |||
| εR, short-time, 5%quantil: | 2.98(%) | 2.43(%) | |||
| Reduction ratio A1: | 1.78(-)1 | 1.33(-)1 | |||
| Elong-term, 5%quantil: | 4200 (N/mm2) | 8100 (N/mm2) | |||
| εR, long-term, 5%quantil: | 1.67(%) | 1.83(%) | |||
| δbz, long-term, 5%quantil: | 110 (N/mm2)2 | 170 (N/mm2)2 |
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1. according to DIBt-license, Germany
2. δbz, long-term, 5%quantil = εR, long-term, 5%quantil * Elong-term, 5%quantil
δbz = bending stress,
E-Modulus = Modulus of elasticity
Valuation with the program “ LinerB “, Version 7.2.
All data without guarantee.
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