Fine Forged Upset Forging Parallel Thread Coupler

The Upset Forging Parallel Thread Coupler is a high-performance parallel thread mechanical splice system achieving “bar-break” performance up to 800MPa under tensile load. It realizes the connection of steel bars by first upsetting the ends of the steel bars, then processing them into straight threads, and finally connecting them with sleeves.This series encompasses various certified and performance-tested couplers, such as  ISO15835 standard rebar couplers, Bartec couplers, CARES and DCL-approved rebar couplers, and slip test-qualified rebar couplers. CPDL specializes in producing upset forging parallel thread mechanical rebar couplers. The standard product line covers diameters from 12mm to 40mm; additionally, it manufactures premium large-size couplers (including 50mm, 55mm, and 60mm variants) tailored to specific client requirements.

Size: from 12mm to 40mm

Meet the requirements of steel bars: HRB500/B500B/SD600/ASTM 75

Material:45C/40CR

Standard: BS4449, ISO15835,ACI318

Certificate: UK ,DCL

▎Advantage:

• Higher joint strength: After the end of the reinforcing bar is upset, the cross-sectional area increases, and the thread does not weaken the cross-section of the reinforcing bar. The joint strength is significantly higher than that of the parent material, making it the preferred choice for high-stress and large-diameter reinforcing bars.

• Good seismic and fatigue resistance: It is suitable for repeated and dynamic loads, and is particularly suitable for projects such as bridges and high-speed railways.

• More stable thread quality: After upsetting, the thread is machined, resulting in a full thread profile and high precision, with an extremely high joint qualification rate.

• Applicable to large-diameter and high-strength reinforcing bars: For high-strength and large-diameter reinforcing bars such as HRB500, Φ32, Φ36, and Φ40, it is safer than ordinary straight threads.

• Equally convenient for on-site construction: It is still a matter of screwing on the coupler, which is easy for workers to operate and quality to check.

▎Application & Installation Position

• Large-diameter reinforcing bars (Φ32 and above): Main bars with large diameters for super high-rise buildings, large bridges, and large factories.

• High-strength reinforcing bars (HRB500E/B500B/SD600/G75/G80 and above): For high-strength reinforcing bars, common straight thread connections are prone to thread disengagement, while the upset straight thread connection is more reliable.

• Key projects such as bridges, high-speed railways, and subways: Bridge pile foundations, piers, and cap beams. High-speed railway box girders, track beams, and subway tunnel structures. Designs often specify upset straight thread connections.

• High seismic and high fatigue areas:Frame support columns and beams in high-rise and super high-rise buildings. Beams with heavy loads, and key nodes with seismic grade one must use upset type coupler.

• Structures with extremely high requirements for joint reliability: Large sports venues, airports, exhibition centers, transfer floors, strengthened floors, and connected structures prefer upset coupler.

▎FAQ

1. What material is your upset rebar coupler made of?

Our upset coupler adopts 40Cr alloy steel, high tensile strength for heavy construction.

2. What rebar sizes do your upset couplers support?

Fit rebar diameter from 12mm to 40mm, customized sizes are acceptable.

3. Which international standards can your couplers meet?

Comply with JGJ107, ACI318, BS8110, TCVN8163 for global projects.

4. What advantages does upset forging process have?

Cold upsetting avoids rebar section loss, stable connection & good seismic performance.

5. Is cross-threading easy to happen during installation?

Adopt standard parallel thread, effectively prevent sliding wire and cross-threading.

6. What engineering scenarios are these couplers suitable for?

Widely used in high-rise buildings, bridges, tunnels, railways and water conservancy.

7. Can you provide OEM & customized service?

Yes, we support OEM logo, special thread and customized packaging requirements.

8. How long is your production lead time?

Regular stock goods ship within 3-7 days, bulk custom orders take 7-15 days.

9. What’s the tensile strength of your upset rebar coupler?

Tensile strength ≥980MPa, connection strength exceeds original rebar.

10. What package do you use for export shipment?

Standard carton packing, wooden pallets are available for sea transportation.