TPi May 2019

Products & developments

Compounds for pipes seals proven to offer longer service life

for the F-601 Power-Lock for plastic sewage and potable water pipes, and the F-165 integrated seal for concrete pipes. The Elastocon testers exposed the elastomer in the seals to a series of elevated temperatures, which enabled them to deduce the effects of temperature on the stress relaxation rate of the seals. As per the ISO guidelines, a maximum relaxation level of 50 per cent was then set. From here, the testers were able to calculate the service life of each system, based on the number of years the elastic in the seal will take to reach the 50 per cent threshold. Trelleborg Pipe Seals – Netherlands www.trelleborg.com Elastocon AB – Sweden

An independent ‘stress relaxation’ test has determined that the average perfor- mance lifetime of some of Trelleborg’s key pipe sealing compounds is in excess of 800 years. Elastocon AB found that Trelleborg’s elastomeric compounds remain within the acceptable 50 per cent relaxation threshold significantly longer than rival solutions – more than seven centuries longer, in some cases. Trelleborg’s compounds recorded an estimated performance lifetime of 789 and 928 years. With an average estimated service lifetime of 841 years, Trelleborg outranked the mean lifetime of the four other systems tested, which was just 97 years. Julian West, product manager for Trelleborg’s pipe seal operations, commented, “A minimum estimated pipe lifetime of 120 years remains the industry norm. However, amid changing

Stress relaxation test results by Elastocon

climates and increased scrutiny of water usage, the current rate of replacement will require pipeline systems to last in excess of 800 years in some countries. Choosing seals manufactured from high- performance compounds designed to last 500 years or more may well become a necessity for network owners in years to come.” Using ASTM and ISO methodology, Elastocon set up a testing programme involving a selection of eight sealing systems currently on the market. These included Trelleborg’s compounds used

info@elastocon.se www.elastocon.se

Jingning Junwen Steel Co., Ltd

Stainless Steel Seamless Pipe / Tube Type:

Stainless Steel Cold Drawn Seamless Tubing in Coils & Pipe Coils (Made of Cold-Drawn Pipe Billet Instead of Plank-Welding) Type: Austenitic stainless steel seamless pipe Process Method: Cold Drawn / Cold Rolled Surface Finish: Bright Annealed Grade: TP304, TP304L, TP316 / 316L Dual Grade Standard: ASTM (ASME) SA / A312 / A213 / A269 and DIN, GB, JIS Size: OD 3 / 16 "-1" (4.76mm-25.4mm), WT 0.028"-0.083" (0.7mm-2.11mm) Tolerance: Outer Diameter: ±0.08mm (0.00315"), Wall Thickness: ±10% Length: 100ft-2,000ft, or according to customers’requests Certification: ISO9001:2000,GB/T19001-2000

Austenitic stainless steel seamless pipe

Process Method: Surface Finish:

Cold Drawn / Cold Rolled

Bright Annealed / Pickling / 180# 240# 320# 400# 600# Manual Polished / Mechanical Polished

Grade:

TP304, TP304L, TP316 / 316L Dual Grade.

Standard:

ASTM (ASME) SA / A312 / A213 / A269 and DIN, GB, JIS " (6mm-38mm), WT 0.028"-0.118" (0.7mm-3mm) Outer Diameter: ±0.08mm (0.00315"), Wall Thickness: ±10% OD 3 / 16 "-1 1 / 2

Size:

Tolerance: Certification:

ISO9001:2000, GB/T19001-2000

Our products are widely used in petrol, chemical, pharmacy, foodstuff, machinery, aerospace, military, hardware, boiler gas, hot-water heating parts, shipping, power and other industries, heat-exchangers and cold treatments for chemical industry, and gas transmission pipelines. We can offer stainless steel pipes according to our customers’ requirements.

No. 88 Shiniu Mountain, Jingning, She Autonomous County, Zhejiang, China Salesman: Sam | Mobile: +86 13305889498 | Tel: +86 578 5973358 | Email: jw@jw-steel.com

www.jw-steel.com

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TUBE PRODUCTS INTERNATIONAL May 2019

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