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Knowledge base

Winland Trading Co., Ltd. is a copper pipe & fittings supplier in China. We offer various types of copper pipes, you could contact us by

Causes of copper corrosion, how to stop copper corrosion and the way we could prevent copper corrosion.

Very useful tips for air conditioning, refrigeration, heating, construction and other fields.

The refrigerant R410A requires strict cautions for keeping the system clean, dry and tight.

  • Clean and dry: foreign materials (including mineral oils or moisture) should be prevented from getting mixed into the system.
  • Tight: R410A does not contain any chlorine, does not destroy the ozone layer, and does not reduce earth's protection against harmful ultraviolet radiation. R410A can contribute slightly to the greenhouse effect if it is released. Therefore we should take special attention to check the tightness of the installation.

Dakin VRV REFNET Joint pipe specification and technical drawings

Copper elbow for shipbuilding


Ø15 Ø16 Ø18 Ø19 Ø22 Ø28 Ø35 Ø42 Ø54 Ø67


     EDUS39-605-N VRV Installation Handbook

1. Center of Gravity ...............................................................1

2. Foundation Drawing........................................................... 2

3. REFNET Pipe System ...................................................... 3

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Copper Disperse Pipe only for R410A HITACHI size tech drawing

Source: Metal Supermarket

Copper, Brass and Bronze, otherwise known as the “Red Metals”, may look the same initially but are actually quite different.

Source: Wikipedia

Brass is a metal alloy made of copper and zinc; the proportions of zinc and copper can be varied to create a range of brasses with varying properties. It is a substitutional alloy: atoms of the two constituents may replace each other within the same crystal structure.

It is up to the designer to select the type of copper tube for use in a particular application. Strength, formability and other mechanical factors often determine the choice. Plumbing and mechanical codes govern what types may be used. When a choice can be made, it is helpful to know which type of copper tube has and can serve successfully and economically in any given application.

Copper pipe art ideas for home decoration


Cut to the exact length required using a tube cutter or hacksaw. If a hacksaw is used, a sawing fixture should also be used to ensure square cuts. Remove all inside and outside burrs with a reamer, file, or other sharp edge scraping tool. If tube is out of round, it should be brought to true dimension and roundness with a sizing tool.

After the brazed joint has cooled the flux residue should be removed with a clean cloth, brush or swab using warm water. Remove all flux residue to avoid the risk of the hardened flux temporarily retaining pressure and masking an imperfectly brazed joint. Wrought fittings may be cooled more readily than cast fittings, but all fittings should be allowed to cool naturally before wetting.

Cleaned and capped copper tube,  designed to meet the rigorous demands for cleanliness and consistency in medical gas installations. Paired with our cleaned and degreased copper fittings, we offer customers a complete system of tube and fittings.

Winland offers a complete line of  tube for HVAC and Refrigeration applications. Our process ensures consistent cleanliness and quality that our customers have come to expect of all tube products.

Winland offers high quality seamless red straight copper pipe with factory price. Our products meet the international standards such as ASTM B280, ASTM B68, ASTM B75, ASTM B88, ASTM, B837, ASTM 306, EN 1057.