SHAIC HT-350 is a heat shrinkable tube designed for corrosion protection of field-welded joints of plastic coated steel pipelines. It has a thick crosslinked polyethylene backing coated with butyl rubber based mastic sealant or hot melt adhesive. When heated the backing layer shrinks and the sealant flows and forms a reliable corrosion protection seal onto metal and adjacent coating surfaces.
Tubular Configuration
SHAIC HT-350 needs no patch closure and should be slid over the pipe prior to welding the joint.
Its unique design reduces time for handling, positioning and installation of Patch Closure.
This minimizes application time and labour Simple Application costs
Long-term Corrosion Protection
After heating, formed corrosion protection seal, and strong backing provides outstanding waterproofing effect
and high chemical resistance. SHAIC HT-330 resists impact, abrasion and ultraviolet light. Excellent resistance
against cathodic disbondment, dielectric breakdown.
Simple Application
No special skills, equipments, patch closure nor primer are needed. Slide the tube over the pipe before
welding the joint. Position the tube over welded, foreign matters-free and preheated joint. Remove the
release liner and temporarily insert'spacing pads'between the pipe and the tube at both upper edges
of the tube to keep it away from the pipe and to facilitate the application. Remove "spacing pad" when
the tube is shrunk at the center, and then move torch circumferentially to heat the left and the right half
of the tube. Finish off by heating over the entire tube vertically to ensure a uniform adhesion and by using
a roller or gloved hands to remove wrinkle and air.
Physical Properties
Physical Properties
Properties |
Test Method |
Values |
Inner
Layer |
Softening Point |
ASTM E28 |
110°C(230°F) |
Lap Shear |
DIN 30672 (ASTM D1002) |
24N/cm2(35psi) |
Outer
Layer |
Tensile Strength |
ASTM D638 |
17Mpa(2500psi) |
Elongation |
ASTM D638 |
400%↑ |
Hardness |
ASTM D2240 |
45↑ |
Volume Resistivity |
ASTM D257 |
1015↑Ω㎝ |
Dielectric Breakdown |
ASTM D149 |
27kV |
Tube |
Impact Resistance |
ASTM G14 |
Pass holiday
detection test
with 10kV detector |
Penetration Resistance |
ASTM G17 |
Water Absorption |
ASTM D570 |
0.05%↓ |
Cathodic Disbondment |
ASTM G8 |
20mm |
Adhesion
Strength |
To P.E |
ASTM D1000 |
30N/cm |
To Steel |
30N/cm |
Pipe Size & Tube Size
Pipe Size & Tube Size
Pipe Size |
Pipe O.D (mm) |
Pipe Circum- ference (mm) |
SHAIC HT-350 |
Length (mm) |
Thickness(mm) |
Width (mm) |
DN |
Inch |
Outer |
Inner |
50 |
2 |
60.5 |
190 |
280 |
0.75 |
1.25 |
450 |
80 |
3 |
89.1 |
280 |
350 |
100 |
4 |
114.3 |
359 |
440 |
125 |
5 |
139.8 |
439 |
520 |
150 |
6 |
165.2 |
519 |
600 |
200 |
8 |
216.3 |
679 |
810 |
250 |
10 |
267.4 |
840 |
970 |
300 |
12 |
318.6 |
1,000 |
1,130 |
350 |
14 |
355.6 |
1,117 |
1,260 |
40 |
16 |
406.4 |
1,276 |
1,420 |
450 |
18 |
457.2 |
1,436 |
1,590 |
500 |
20 |
508..0 |
1,595 |
1,750 |
550 |
22 |
558.8 |
1,755 |
1,910 |
600 |
24 |
609.6 |
1,914 |
2,060 |
Ordering Information
- Standard Tape Type
- Regular Thickness(R1)
- BL-Black, YE-Yellow
- 18”(450m)
- 2”~24” (DN50-600)
- 1.25
- R1-0.75
- T-TUBE
※ Note : 1. Min. Sleeve Width=Bare Steel Width +2”(50mm) min. on each side of the pipe joint.
2. Various length is available for unique project requirements.