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巴基斯坦市場采購管道防腐熱縮帶簡單分析

  巴基斯坦石油産量在全球來講排名是比較靠後的,但是巴基斯坦每年對熱縮帶及附件的需求還是有一定量的。巴基斯坦主要有兩家主要的石油公司,分别是SUI NORTHERN GAS PIPELINES LTD (SNGPL)和SUI SOUTHERN GAS COMPANY LTD (SSGC)。兩家石油公司每年都會面相全球的熱縮帶企業發布采購标書,但是最終這些标都會被CanUSA或者Convalence赢得。因為這兩家公司标書上對熱縮帶産品的要求都是很高的,一般企業都沒辦法完全符合他們的技術要求。因此其他企業都會在技術标上敗下鎮來。以下是這兩家公司标書的主要技術要求。因此熱縮帶企業如果想參加巴基斯坦的競标,産品必須完全符合他們的技術要求。如果不能全部滿足他們的要求,我建議就不要浪費時間去準備了。

 

SNGPL

HEAT SHRINKABLE WRAPAROUND SLEEVES

PERFORMANCE  PARAMETER TEST METHOD UNITS SPECIFICATION VALUE
Full compliance with ENI2068 Class C HT 80 UV requirements EN I2068   Independent Laboratory Test report
EPOXY      
Adhesion of cured epoxy to bare steel ASTM D-4541 PSI >  2,000
Thin film water absorption ASTM D-570 % < 0.1
Cathodic Disbondment at 95°C after 30 days ASTGM  G-42 Mm r < 20
SHRINK SLEEVE BACKING      
Tensile strength @ 23°C ASTM D-638 Psi 2200
Elongation to

 break

ASTM D-638 % >  400
Hardness ASTM D-2240 (Shore D) 55 Min
Volume Resistivity @ 23°C ASTM D-257 Ohm-cm 1 x 1015 (Min)
Heat Aging @ 150°C for 14 days followed by elongation to break at 23°C ASTM D-638 % 350 (Min)
SHRINK SLEEVE ADHESIVE      
Ring and Ball Softening Point of adhesive ASTM E-28 °C 115 ± 10°C
Lap Shear Strength of adhesive @ 23°C

(cross head pulling speed 2”/min) & @ 80°C

ASTM D-1002 N/cm2 OR

N/mm2 OR

Psi

≥ 180 N/ cm2

OR 1.8 N/ mm2 OR 261 Psi

≥ 34 N/ cm2

OR 0.35 N/ mm2  OR 50 Psi

INSTALLED SHRINK SLEEVE SYSTEM      
Peel Strength to Steel @ 23°C EN I2068 N/mm ≥ 1.0
Peel Strength to Factory Coating @ 23°C EN I2068 N/mm ≥ 0.4
Indentation Resistance @ 80°C EN

I2068

Residual thickness>

0.6mm and no Holiday at 15kV

No Holiday at 10 KV
Impact Resistance at 23°C EN I2068 J (Inch-lb) ≥ 11 (95)
Thermal Ageing EN I2068   Pass
Cathodic Disbondment at 80°C after 28 days EN I2068 mmr < 20
Dielectric Breakdown at 23°C A

TM D-149

Kv ≥ 17 KV
Moisture Vapor Transmission of sleeve at 38°C, 90% RH ASTM E-398 Gm / 24hr/ 100 sq.in < 0.08
Water Absorption @ 23°C for 24 Hours. ASTM-D570   0.1 % Min.
Soil Stress Creep Resistance of installed sleeve at 80°C TP-206 Inch after 24

rs

< 0.1
Hot water immersion resistance at 80°C for 120 days ASTM D-870   No de-lamination blisters, or water under sleeves
Holiday Detection     Pass at 20 Kv

 

 

SSGC

Full encirclement heat shrink sleeves with epoxy primer shall be used.

Performance Requirements of Heat Shrink Sleeve for max. Continuous pipe line operating temp. Not exceeding 80°C.

Performance Parameter.

EPOXY
Dry film thickness on steel: 300 microns min.
Pull of adhesion strength to steel at 23°C. ASTM D4541:                  2200 psi min.
SHRINK SLEEVE BACKING
Density of PE 0.95 gm/cc min:
Hardness of backing ASTM D2240: 55 Shore D min.
Tensile strength NACE RP0303/ ASTM D638: 2200 psi min.
Elongation to break NACE RP0303/ ASTM D638: 400% min.
SHRINK SLEEVE ADHESIVE
Ring & Ball Softening point of adhesive ASTM-28: 110 degree C min
Lap Shear Strength of adhesive ASTM D1002: 500 psi at 23 & 50 psi at 80°C min.
INSTALLED SHRINK SLEEVE
Conformance to EN12068 C80 UV EN12068 Class C80 UV independent lab test report confirming compliance.
Peel Strength to Steel & adjacent PE line coating ISO 21809-3/ EN12068: 2.5 N/mm at 23°C

0.2 N/mm at 80°C

Peel Strength to Steel & adjacent PE line coating after 28 days hot water soak at 80°C ISO 21809-3: 1.5 N/mm at 23°C

 

Cathodic Disbondment at 80°C after 28 days ISO 21809-3/ EN12068: 12 mm max.
Indentation resistance at 23°C

 

ISO 21809-3/ EN12068: Residual thickness 0.6mm and no holiday at 15kv.
Impact resistance at 23°C

 

ISO 21809-3/ EN12068: Pass 15 J impact
Ultraviolet resistance EN12068 ClassC80 UV: Pass
Thermal ageing, 100 days at 100°C
– Elongation to break ISO21809-3/ EN12068: E100/EO ≥ 0.75
– Peel strength to pipe surface ISO21809-3/ EN12068: A100/AO ≥ 0.75
Dielectric breakdown at 23°C ASTM D-149: 30kV
Hot water immersion resistance at 80°C for 120 days.  ASTM D-870: No blister or delamination. No water under sleeves.
Soil stress creep resistance of installed sleeve 80°C TP-206: 0.1 inch max, after 24 hrs.
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