China Supplier precast products steel pipe repair coupling mechanical splice Product Description Steel pipe repair coupling is widely used all over world nowadays. It provides a better way than traditional ways like lap joint, welding joint and cold pressing. Based on qualified products, competitive price, good service and good reputation, Dirui rebar couplers are applied to many projects like subways, tunnels, bridges etc both home and abroad. Product overview
Normal types of Coupler
1. Standard coupler 2. Position coupler(left-right handed thread) 3. Transition coupler(different diameter) 4. Nut-locking type 5. Wide Mouth type
Other types 6. Tapered thread coupler 7. Cold forging coupler 8. Upsetting coupler Above types of couplers and other types are available according to your requirement!
Raw material and its property:
Raw material of couplers | Tensile strength ob(Mpa) | Yield strength os(Mpa) | Percentage of elongation after fracture | Rebars suitable |
40Cr | over 980(100) | over 785(80) | over 9 | All grades of standard like ACI318,JDJ107,UBC1997,BS8110,NF35-20-1,DIN1045,ISO15835 GB1499, BS4449, ASTM A615, ASTM A706. |
45C | over 600(61) | over 355(36) | over 16 |
Technical Parameters of steel pipe repair coupling
Coupler Size | Outer Diameter (-0.5~0mm) | Inner Diameter (mm) | Length (-2.0~0mm) | Thread Size | Thread Angle |
D12 | 20 | 10.25(+0.25) | 35 | M12*1.75P | 60° |
D14 | 21.5 | 12.2(+0.25) | 38 | M14.8*2.5P | 60°/75° |
D16 | 25 | 14.4(+0.25) | 42 | M16.8*2.5P | 60°/75° |
D18 | 27 | 16.4(+0.25) | 47 | M18.6*2.5P | 60°/75° |
D20 | 30 | 18.4(+0.25) | 52 | M20.6*2.5P | 60°/75° |
D22 | 32 | 20.4(+0.3) | 57 | M22.6*2.5P | 60°/75° |
D25 | 37 | 23.2(+0.3) | 60 | M26.0*3.0P | 60°/75° |
D28 | 41 | 26.2(+0.3) | 67 | M28.6*3.0P | 60°/75° |
D32 | 47 | 30.2(+0.3) | 75 | M32.8*3.0P | 60°/75° |
D36 | 53.5 | 33.5(+0.3) | 85 | M36.7*3.5P | 60°/75° |
D40 | 59 | 37.5(+0.3) | 90 | M40.4*3.5P | 60°/75° |
D50 | 78 | 47.2(+0.3) | 110 | M50.4*3.5P | 75° |
Production flow: Step 1: Cutting steel tube or solid bar by ATM cutting machine according to needed length; Step 2: For solid bar we use drilling machine to bore holes(for steel tube, this step is not needed); Step 3: Use ATM chamfering&flaying machine to chamfer and peel ribs on the unfinished couplers(some customers donot need this step); Step 4: Then atm or semi-atm coupler threading machine makes internal threads on unfinished couplers(This step is most important) Step 5: Make mark on finishes couplers by Laser engraving machine(some customers donot need mark) Step 6: Testing coupler length by callipers and thread size by screw gauge. Step 7: Packaging and loading.
Quality control and package
Core Competence 1 ISO9001:2008 Certified Enterprise; 2 Trade Insurance Member in Alibaba; 3 12 Years experience; 4 Factory direct sale; 5 Competitive price and fine quality; 6 Rebar coupler in stock.
Company overview:
Thanks for your visiting our website!!! Shanghai Dirui Reinforcing Project Co., Ltd Sales Manager: Daniel Zhou Wechat/Phone/Whatsapp: +86 15618896575 Trademanager: cn1512425827 Skype: jddanielzhou Tel: 86-21-6911 6655