Steel Backing Rings / Steel Flange

Steel Backing Rings / Steel Flange
Product Details

Product Details:
The butt fusion method of joining is by far the most common method of connecting polyethylene pipe in all diameters. The ends of polyethylene pipe when heated and brought together under pressure with specialized equipment form one continuous "leak proof" pipeline. Properly made, a pipe fusion is as strong as the pipe itself and has the same life expectancy.

SUNPLAST HDPE butt fusion fittings are made by imported PE80 or PE100 raw material from famous suppliers that has high resistance, they are mainly used in SUNPLAST HDPE pipe system for water & gas. The HDPE butt fusion fittings can fully comply with EN12201-3, EN1555 & EN ISO 15494 standard.

SUNPLAST has the ability to provide HDPE butt fusion fittings in a wide variety of sizes from DN63mm to DN800mm in SDR11 & SDR17, including: end cap, stub flange, steel backing rings, equal tee, reducing tee, reducer, elbow 45deg, elbow 90deg.,etc.

SUNPLAST has a lot of stock for normal sizes, can be delivered in a short time!!

Product name

Steel backing ring

Sizes available


Pressure Rating

PN16 & PN10 bars

Material used

Carbon steel or stainless steel

Surface finish

Galvanization finish or Nylon coated

Standards follow to

Customized made available


Customer's logo can be stamped

Samples available

Yes, sample available for small quantity

Packing method

Wooden case



Production lead time

Depending on the order quantity.

Warranty time

5 years for normal using

Payment term

T/T or LC at sight

FOB loading port

Ningbo or Shanghai China

Place of origin

Zhejiang, China

Product Specifications:
The steel backing rings can be provided from DN63mm to DN1200mm. The specific specifications as follows:

































Remark: "√" means available, "-" means unavailable

Workshop & manufacturing Facility
SUNPLAST company has two manufacturing workshop located in Zhejiang province China, and the total area covers more than 10000㎡. The workshop is equipped with advanced production lines for HDPE pipes & injection machines for HDPE pipe fittings, such as Barton Heidfeld and Krauss-Maffei extruders, Haitian etc, which feature high production efficiency and great stability. With memory function & high automatic, they ensure the stable quality of pipes & fittings. 




Testing Equipment     
For all SUNPLAST HDPE pipes & HDPE pipe fittings, before shipment, they must pass very strict quality inspection & test, which is throughout the whole production process, from incoming material to finished goods packing. This ensure the pipes & fittings we provide to our customers are 100% qualified. 

All of HDPE pipe & HDPE pipe fittings are made by superior quality PE80 or PE100 raw material from famous suppliers in worldwide, such as Borealis, Sabic, Sinopec.etc. 



Loading & Shipment
SUNPLAST HDPE pipe & fittings has been exporting to more than 30 countries & areas. Due to superior quality & the best service, we have built long & good business relationship with our customers, and they all satisfy about us all the time, some of our customers even have been working with us for more than 10 years. 




※ What are HDPE stub flange used for?  
A: HDPE stub flange/flange adaptor/ stub-end are used to connect HDPE pipes together or to connect to other piping equipment. The polyethylene stub flange is fused to the pipe and then joined to a similar HDPE stub flange or its matching flange of unlike material. It is joined by using bolts and back-up metal rings.    

※ What does "butt fusion" mean? 
A: Butt fusion is a thermofusion process which involves the simultaneous heating of the ends of two pipe/fitting components which are to be joined, until a molten state is attained on each contact surface. The two surfaces are then brought together under controlled pressure for a specific cooling time and a homogeneous fusion joint is formed. The resultant joint is fully resistant to end loads and has comparable performance under pressure to the pipe itself. 

※ What pressure rating can SUNPLAST provide for HDPE butt fusion fittings? 
A: SUNPLAST HDPE butt fusion fittings can be provided in SDR11 & SDR17, with pressure rating of PN12.5bars & PN8 bars for PE80 fittings, PE16bars & PN10bars for PE100 fittings. 

※ How can HDPE pipe & HDPE butt fusion fittings be connected? 
A: The HDPE pipes & HDPE butt fusion fittings are connected by butt fusion welding machine. SUNPLAST is able to provide complete butt fusion welding machine.

Why choose us?
※ More than 15 years'rich experience in manufacturing, we are an expert in this industry.
※ Complete fittings & welding machines to support the connection of pipes
※ Strong after-sale term supports to provide professional guide for installation
※ By using top quality raw material, with long warranty time on quality.
※ Short lead time to satisfy your urgent need request.
※ Quick reply for your enquiries within 12 hours.
※ OEM service available to support a good sale in customers’market.

Contact us
Contact us freely for any inquiries on our products by following:

Telephone: 0086-574-87226883
Fax: 0086-574-87467583
Mob: 0086-15968493053

24 hours on line contact:
whatsApp: 0086-15968493053
Skype: polypipe-manufacturer

Sunplast, through over 15 years' development, is now known as one of the leading manufacturers and suppliers of steel backing rings / steel flange in China. Our factory has introduced many advanced technologies and equipments into it. Please be free to buy the quality and low price products made in China from us.