Topic: The Roles of Stainless Steel Pipes in Re-plumbing Works

Organizer：

Materials Division

Date, Time & Venue

28 February 2022 (Monday)

Time: 6:30pm -8:00 pm, at Chan Yat Mei Sophie Room, 9/F of the HKIE Headquarters.

Speaker: Dr. Eric Cheng and Mr. Wong Tak Shing,

Dr Eric Cheng ,BAAS, BBldg, MSoSc, LLM, EdD, FHKIPD,FHKIS,FRICS, chartered Surveyor since 1984; a director of GHMSS Pipes Company Limited, an ex-Vice Chairman of the Hong Kong Institution of Plumbing and Drainage and a recent retired Senior Lecturer and assistant head from the City University of Hong Kong, a founder member of the Hong Kong Stainless Steel piping and Fittings Merchants Association. Associate Head (BST) College of Engineering, City University of Hong Kong

Mr. Wong Tak Shing MHKIPD

Licensed Plumber from 1976 to present with over 51 years ‘ plumbing experience; Director of GHMSS Pipes Company Limited, an ex-technical Committee Member of the Hong Kong Institution of Stainless Steel piping and fittings Merchants Association.

Programme Highlights

The Water Supplies Department has given praises to stainless steel pipe materials for being of high pressure capability, good corrosion resistance, high strength and durability, and ease of jointing. Apart from these, tis space age materials is now cheaper which provides a golden opportunity to expand its usage in re-plumbing works in a revolutionary way. The seminar will highlight on iron, stainless steels and pipe jointing methods, re-plumbing requirements including client’s expected quality; abatement of nuisance on residents during refurbishment, rules and regulations to follow; safety precautions; work programme details, implementation of temporary water supply with no water supply suspension; fire prevention and noisr control; external wall operation to work from height; water sample test after installation and disposing dismantled materials.

A.     Introducing iron, stainless steels and pipe jointing methods

B.     Client’s expected quality

C.     Rules and regulations to follow

D.  Safety precautions

Registration & Enquiries

The talk would be carried out on both physical (15 seats) and zoom (100 seats) arrangement. Registration is required. Please fill the application before on 27 February 2022. Confirmation will be made through email. For physical, the maximum of participants is 15, for Zoom meeting, the participants would be limited to 100. For enquiry, please contact Ir CS Lam at 91527659. Attendance Certificate will be issued within 3 weeks after completion of the seminar. Applicants please fill the googles registration form at 

https://docs.google.com/forms/d/e/1FAIpQLSfFF3o31dmmXR0cw7l51_9t1y6z5dVtZviL9ilqI8_EdnMZdg/viewform

By Ir LAM Chi Sing

A webinar on the above mentioned topic was organized on 28 Feb 2022 at the HKIE Headquarters. Two speakers-Dr Eric Cheng and Mr. Wong Tak Shing were invited to share their experience. The first speaker introduced that the Water Supplies Department (WSD) (June 2020) has remarked the use of stainless steel pipe in the plumbing works. The stainless steel pipe has excellent corrosion resistance with combining a number of chemical composition with inclusion of iron, chromium, nickel, carbon, manganese and silicon for grade 304, molybdenum for grade 316, and Nitrogen element for grade duplex steel 1.Stainless steel is a high quality and strong material with corrosion resistance. It is suitably applied in the plumbing work, potable water, wastewater treatment, desalination and brine treatment. The University research study shows that stainless steel 316L has inhibitory effects on SARS-CoV-2 and H1N1 Virus. The stainless steel has high strength with high melting point and can resist to pitting corrosion. It can be recycled with practicably no loss in strength. The use of stainless steel pipe can save water used to flushing copper pipes and fittings in newly constructed buildings. Referring to the WSD Circulate letter No5/2017, online re-plumbing works of stainless steel pipe is recommended for use of refurbishment and replacement of aging pipe work.

The second speaker delivered that the WSD has introduced Australia Standard AS3688 to make a joint connection method to stainless steel pipe. It included screw BS6362, expanded collar, rolled –grooved and push or press-fit method of AS3688 standard. The connection portion has a protruded point fitted with a rubber olive (croxed fittings). The water pipes connection can be designed with prefabricates in the manufacturer’s workshop and delivered to site for assembly and installation. This method can shorten the replacement and installation time, minimize disturbance of interrupted water pipe, it is also cost saving with high quality installation. It is better suitable for old building replacement plumbing system.

The webinar ended with question-and-answer session.

337 words.

Ir CS Lam and Dr Eric Cheng(speaker) 

Ir CS Lam and Wong Tak Shing (speaker)