Heavy duty double bolt Malleable iron cast steel metal hose clamp

Place of Origin	CHINA
Brand Name	HX
Certification	ISO9001
Model Number	1/2-12
Minimum Order Quantity	500
Price	Negotiable
Packaging Details	Carton
Delivery Time	15 DA
Payment Terms	T/T
Supply Ability	10000000000 PCS PER WEEK

Product Details

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Product Description

Our EN74 / BS1139 compliant Steel Galvanized Swivel Coupler Clamps are engineered scaffolding components designed to securely connect scaffold tubes at any angle. Available in drop-forged, pressed steel, and cast iron variants, these couplers provide reliable, high-strength connections essential for construction, industrial maintenance, and temporary structural applications .

Manufactured from Q235 grade steel with a protective hot-dip galvanized or electro-galvanized surface finish, these couplers deliver exceptional corrosion resistance and structural integrity even in demanding outdoor and coastal environments. Compliance with EN74-1 and BS1139 standards ensures they meet rigorous international safety and quality benchmarks for scaffolding fittings .

Key Features & Benefits

Three Manufacturing Options: Choose between drop-forged couplers for maximum strength and heavy-duty applications (Class B), pressed steel couplers for a cost-effective balance of performance and economy, or cast iron variants for general-purpose use .
BS1139 & EN74-1 Certified: Fully compliant with British and European scaffolding standards, ensuring safety and regulatory acceptance on professional construction sites .
Versatile Swivel Design: Allows connection of scaffold tubes at any angle (360° rotation), providing flexibility for complex scaffolding configurations, bracing, and diagonal supports .
Superior Corrosion Protection: Hot-dip galvanized or electro-zinc plated surface treatment delivers long service life, even in high-humidity or salt-exposed environments .
High-Strength Material: Constructed from Q235 steel with Grade 8.8 T-bolts and nuts (1/2" × 82mm), ensuring reliable load-bearing capacity and slip resistance .
Anti-Slip Design: Ribbed internal surfaces provide enhanced grip and prevent tube slippage under load .
Secure Fastening: Equipped with captive nuts (AF 21mm–23mm) to prevent loss during assembly and disassembly, compatible with standard spanners .

Technical Specifications

Parameter	Detail
Applicable Standards	EN74-1 (Class A & B), BS1139
Material	Q235 carbon steel (drop forged / pressed steel plate) / Ductile cast iron
Surface Finish	Hot-dip galvanized (HDG) / Electro-zinc plated / Self-colour
Tube Diameter Compatibility	48.3mm, 48.6mm, 60.3mm, 76mm, 89mm (standard); custom sizes available
Bolt Specification	1/2" × 82mm T-bolt, Grade 8.8 high-strength steel
Nut Spanner Size	AF 21mm, 22mm, or 23mm (depending on model/regional standard)
Slip Resistance	>15 kN (Class B compliant)
Failure Load	>20 kN
Manufacturing Types	Drop-forged / Pressed steel / Cast iron
Design Type	British Type (also available: American, German, Japanese, Korean standards)
Certification	ISO 9001, CE, SGS (available upon request)

Manufacturing Process Comparison

Aspect	Drop-Forged Coupler	Pressed Steel Coupler	Cast Iron Coupler
Raw Material	Q235 / S235 steel round bar	Q235 / SPHC steel plate	Ductile / malleable cast iron
Process	Heating and forging in molds, heat treatment	Punching, forming, cutting, drilling	Molten iron casting in molds
Strength & Durability	Highest strength; suitable for heavy-duty Class B applications	Medium-duty; cost-effective alternative	Good for general-purpose use
Weight (48.3mm)	Approx. 1.10 – 1.12 kg/pc	Approx. 0.85 – 1.05 kg/pc	Approx. 0.85 – 0.90 kg/pc
Typical Applications	Oil & gas, petrochemical, high-load industrial scaffolding	General construction, temporary structures	Light to medium construction

Dimensional & Weight Reference Table

Coupler Type	Specification (mm)	Weight (approx.)	Manufacturing	Surface Treatment
Swivel Coupler	48.3 × 48.3	1.00 – 1.12 kg	Drop-forged	HDG / Electro-galvanized
Swivel Coupler	48.3 × 48.3	0.85 – 1.05 kg	Pressed steel	HDG / Electro-galvanized
Swivel Coupler	48.3 × 48.3	0.85 – 0.90 kg	Cast iron	Painted / Galvanized
Swivel Coupler	48.3 × 60.3	~1.40 kg	Drop-forged	HDG / Electro-galvanized
Swivel Coupler	60.3 × 60.3	~1.60 kg	Drop-forged	HDG / Electro-galvanized
Double (Right-Angle) Coupler	48.3 × 48.3	0.82 – 0.98 kg	Pressed / Forged	HDG / Electro-galvanized
Putlog Coupler	48.3 mm	0.58 – 0.63 kg	Pressed / Forged	HDG / Electro-galvanized
Board Retaining Coupler	48.3 mm	0.57 – 0.62 kg	Pressed / Forged	HDG / Electro-galvanized

Custom diameters, bolt lengths, and surface finishes available upon request.

Typical Applications

High-rise building internal and external grid scaffolding
Bridge, viaduct, and tunnel formwork support systems
Industrial plant maintenance and inspection platforms
Oil & gas industry onshore and offshore scaffolding (compliant with Aramco, KNPC, KOC, Sinopec, etc.)
Temporary grandstands, stages, and event structures
Offshore and coastal construction projects requiring premium corrosion resistance

Quality Assurance & Compliance

All our swivel coupler clamps undergo rigorous roundness testing and slip/load safety testing in accordance with EN74-1 Class B requirements . Products are backed by ISO 9001 quality management systems and, where applicable, CE and SGS certifications . Consistent production processes ensure reliable torque performance, bolt security, and dimensional accuracy.

Why Choose Our Couplers?

Proven Compliance: Full adherence to BS1139 and EN74-1 standards—trusted by scaffolding contractors worldwide .
Flexible Manufacturing: Forged, pressed, and cast iron options allow you to match strength requirements with budget constraints .
Regional Standard Availability: British, American, German, Japanese, and Korean types available .
Global Shipping & Support: Reliable supply chain with responsive technical assistance for project-specific customization .
Cost-Effective Durability: Long service life reduces replacement frequency and total cost of ownership.

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