Product profile

HSWS, Two-piece, with separate closures designed for the corrosion protection. HSWS is superior performances heat shrinkable products designed for corrosion protection on field applied girth-weld joints of buried and exposed steel pipelines operating up to 80 ºC (176 ºF).
The inner layer is two-components epoxy primer which coated on steel pipe; Intermediate level is special hot melt adhesive;
Outer layer is modified radiation crossing linking polyethylene backing.

Features & Benefits:
Heat Shrinkable Sleeves provide great corrosion protection, Superior resistance to Cathodic Disbondment and excellent durability against abrasion and chemical attack. The result is effective, good performance of sealing, wide application, easy to operate and preheating temperature low (50 ºC), long term protection against corrosion.
HSWS is a wraparound sleeve with a separate closure.
 Cross-linked backing provides superior abrasion, mechanical and chemical attack resistance.
High performance adhesive provides excellent resistance to Cathodic Disbondment to ensure long-term corrosion protection
Just-in-time customized lengths allow bulk rolls to be field cut to protect any pipe size
Open sleeve configuration allows the product to be applied after the pipeline has been welded and cleaned
Closure patch: 100mm, 150mm 

Properties of sleeve:

Physical Properties			Typical Values	Unit	Test Method
Adhesive	Softening point		110(230)	ºC (ºF)	ASTM E28
	Lap shear at 23 ºC		2.8(406)	Mpa(psi)	ASTM D1002
	Lap shear at 60 ºC		0.2(29)	Mpa(psi)	ASTM D1002
Backing	Specific gravity		0.93	g/cm3	ASTM D792
	Tensile strength		24(3480)	Mpa(psi)	ASTM D638
	Elongation		700↑	%	ASTM D638
	Hardness		50	Shore D	ASTM D2240
	Abrasion resistance		35	mg	ASTM D1044
	Volume resistance		1015	Ohm-cm	ASTM D257
	Dielectricvoltage breakdown		32	KV	ASTM D149
Sleeves	Impact		15↑	N·m	ASTM G14
	Free longitudinal contraction		25	%	ASTM D2732
	Peel strength	To Primer Steel	140	N/cm	ASTM D1000
		To PE Lining	100	N/cm	ASTM D1000
	Cathodic disbondment		15	mm	ASTM G8
	Water absorption		0.05↓	%	ASTM D570
	Low Temp. flexibility		-32(-26)↑	ºC (ºF)	ASTM D2671-C
Max. Operation Temperature				65℃（149℉）

dimensions ordering info:

Adhesive Thickness	1.1mm（45mils）	1.3mm(50mils)	1.6mm(65mils)	Width：300mm～610mm（12"～24.4"）
Backing Thickness	0.6mm（25mils）	0.9mm(36mils)	1.1mm(43mils)
Sleeves Thickness	1.7mm(70mils)	2.2mm(86mils)	2.7mm(108mils)
Installed sleeve Thickness	1.9mm(142mils)	2.4mm(94mils)	3.0mm(118mils)

Working drawing