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| Customization: | Available |
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| Warranty: | Contact Us |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
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Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
Mainly engaged in the development, production and sales of all kinds of forgings, mechanical accessories,
auto parts. The company has production department, quality inspection department, marketing department,
Equipment
»80 sets of CNC turning machines;
»30 sets of the most technologically advanced machining CNC milling machines;
»30 sets of Multi-Spindle Japan Precision Swiss CNC lathes.
Our service
1.Competitive price: we would always try our best to meet your target price.
2.Short lead time: around 10-30 days(according the order quantity).
3.Prompt feedback: all your emails and questions would be processed immediatly.
4.Quality: according the given standard such as ASTM,DIN,EN etc.
5.Flexible payment terms: TT/LC or others ( negotiate with purchaser)
6.Inspection: Third Party Inspection or customer of inspection both ok.
7.Documents: MTC,Packing list,Commercial invoice and CO.
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Warranty
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1 Year
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After-sale Service
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Online technical support
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Project Solution Capability
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graphic design, total solution for projects
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Application
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Outdoor
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Design Style
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EUROPEAN
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Place of Origin
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China
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Color
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Silver
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Size
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48.3
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Material
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Q195 / Q235 / Q345
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package
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steel pallet,carton,plywood case,as request
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Supply capacity
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5000pieces a day
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Surface treatment
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electro galvanized
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standard
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EN74/BS1139
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RFQ
Customer Inquiry →Engineering Communication →Cost Analysis →Sales Analysis →Quote to Customer
» 1-3 Work Days Only
» Submit RFQ with complete commercial terms
Sample Making
Sample Order → Engineering Review → Sample Plan to Customer → Sample Status Tracking →
Submit Samples with Doc.
» Tooling L/T: 2-4 weeks, Sample L/T: 1 week
» Continuous Sample Status Tracking
» Complete Documents for sample approval
Order Management CRM System → Open Order Confirm → Logistic Arrangement.
» Production L/T: 2-4 weekends
» Weekly Open Order Confirm
» Preferred 3PL Service to Customers Shipping
1. FedEx/DHL/UPS/TNT for samples, Door-to-Door;
2. By Air or by Sea for batch goods, for FCL; Airport/ Port receiving;
3. Customers specifying freight forwarders or negotiable shipping methods!
Delivery Time: 3-7 days for samples; 5-25 days for batch goods.
Payment:
1.T/T, MoneyGram,PayPal; 30% deposits; 70% balance before delivery.
2. By Air or by Sea for batch goods, for FCL; Airport/ Port receiving;
3. Customers specifying freight forwarders or negotiable shipping methods!
Delivery Time: 3-7 days for samples; 5-25 days for batch goods.
Q1: What is a Scaffolding Coupler and what is its function?
A: A Scaffolding Coupler is a critical load-bearing component used to securely connect two scaffold tubes (pipes) together, forming a rigid and stable scaffold structure. Its primary function is to transfer forces between tubes, ensuring the integrity and safety of the entire system. Proper coupler selection and installation are essential for structural stability.
Q2: What are the main types of couplers and their uses?
A: The three fundamental types, as defined by major standards (BS/EN), are:
Right-Angle Coupler (Double Coupler): Used to connect two tubes at a 90-degree angle. It is the primary coupler for connecting ledgers (horizontal) to standards (vertical tubes). This is the only type considered load-bearing for right-angle connections.
Swivel Coupler (Swiveling Double Coupler): Used to connect two tubes at any angle (other than 90°), such as for diagonal braces (bracing). It consists of two parts that pivot.
Sleeve Coupler (Joint Pin): Used to join two tubes end-to-end in a straight line to create a continuous load-bearing member (e.g., lengthening a standard or ledger).
Q3: Are there other common types?
A: Yes, complementary types include:
Putlog Coupler (Single Coupler): Used to attach a single transom (putlog) or board bearer to a ledger. It has one fixed jaw and one sliding jaw.
Girder Coupler (Beam Clamp): Specifically designed to clamp onto the flange of an I-beam or universal beam, providing a secure anchor point for the scaffold.
Base Plate: A plate fixed to the bottom of a standard to distribute the load to the ground or supporting surface.
Q4: What materials are couplers made from, and how are they protected?
A: High-quality couplers are typically forged from low carbon steel or alloy steel for high strength and ductility. The standard corrosion protection is hot-dip galvanizing (HDG), providing a durable, thick zinc coating suitable for harsh outdoor and industrial environments.
Q5: What does the Safe Working Load (SWL) mean, and what is the typical load capacity?
A: The SWL is the maximum load the coupler is certified to sustain under normal use. According to BS EN 74-1, a standard right-angle or swivel coupler must withstand a minimum slip load of 6.25 kN and a minimum ultimate load of 15 kN. Sleeve couplers have higher tension/compression requirements. Always check the manufacturer's certification.
Q6: How do I choose the correct coupler for my scaffold tube?
A: You must match the coupler to the tube's outside diameter (O.D.). The most common sizes are:
48.3mm O.D. Tube (Scaffold Tube): Use a 50mm Coupler (nominal size). This is the industry standard.
42.4mm O.D. Tube (Tube & Fitting): Use a 48mm Coupler.
60.3mm O.D. Tube (Heavy Duty): Use a 60mm Coupler.
Using the wrong size is extremely dangerous.
Q7: What is the correct tightening procedure?
A:
Ensure the tubes are in full contact inside the coupler jaws.
Tighten the nut/bolt using a scaffold spanner (wrench) of the correct size.
Apply sufficient force until the coupler is "hand-tight" plus a final quarter-turn (or as per manufacturer's torque specification). The coupler should not be able to move on the tube under hand pressure.
Never use a pipe extension ("cheater bar") on the wrench, as overtightening can damage the coupler or tube.
Q8: Can couplers be used on damaged or corroded tubes?
A: NO. Couplers must only be used on tubes that are in good condition:
No excessive corrosion (especially pitting).
No dents, bends, or cracks.
No paint, concrete, or heavy dirt that prevents full metal-to-metal contact.
Using damaged components compromises the entire structure's safety.
Q9: How often should couplers be inspected?
A: They require pre-use inspection before each project and regular formal inspections (e.g., weekly, after extreme weather, or if damaged). A competent person must perform these inspections.
Q11: What should I look for during an inspection?
A:
Cracks or deformations in the forging.
Wear on the jaws or threads.
Corrosion that reduces the cross-sectional area.
Damaged, stretched, or missing nuts/bolts.
Distortion or bending of the bolt.
Any defective coupler must be immediately tagged and removed from service.
Q10: What is the typical service life of a coupler?
A: There is no fixed calendar lifespan. Service life depends entirely on usage conditions, frequency of inspection, and maintenance. A well-maintained, hot-dip galvanized coupler used within its SWL and stored properly can last for many years. Lifespan is determined by condition, not age.
If there's anything I can help, please feel free to contact with me.
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