What are the requirements for valve supply?

1. General requirements
(1) Valves must be manufactured in accordance with the relevant technical standards, design drawings, technical documents and order contracts. They can only be shipped after passing the inspection.
(2) When there are special requirements, they should be specified in the order contract, and the inspection and supply should be in accordance with the specified requirements.
(3) The manufacturer should supply the products required by the user within the period specified in the contract.
2. Coating and protection
(1) Except for austenitic stainless steel and copper valves, the non-machined outer surfaces of other metal valves should be painted or coated as required by the contract.
(2) The machined surfaces that are not painted or have no anti-rust layer must be painted or sprayed with a similar easy-to-remove anti-rust layer. The inner cavity and parts of the valve shall not be painted and should be free of dirt and rust.
(3) After the inspection and test are completed, the debris and water inside the valve should be cleaned and blown dry for transportation. Valves should be protected from mechanical damage and atmospheric corrosion during transportation and should be able to withstand on-site storage for at least 18 months prior to installation.
(4) The manufacturer's standard paint is applicable to non-machined surfaces. Bronze, stainless steel and high alloy valves should not be painted.
(5) Austenitic stainless steel valves should be protected from chloride corrosion caused by exposure to salt spray or atmospheric air during transportation, cleaning, manufacturing, testing and storage. If transported by truck in areas where chloride salts are used, protection should also be provided. Consideration should be given to sealing or wrapping with moisture-proof materials.
(6) For carbon steel and ferritic alloy steel flanged and butt-weld valves, the end flange sealing surfaces and grooves should be coated with a removable or solvent-removable rust-proof coating before the end protection is installed.
(7) The end faces of flanged and butt-weld valves should be protected with metal plates, fiberboard, thick plastic sheets or wooden boards and tightly attached to the valve body. Valves with threaded or socket ends and drain ports should have these ends protected by metal, wood or plastic plugs.
(8) Threaded and socket weld openings should be sealed with plastic or metal protectors to prevent dust or other foreign matter from entering the valve interior.
3. Marking
(1) Unless otherwise specified, American standard valves shall be marked in accordance with API 600, API6D or MSSSP-25, and national standard valves shall be marked in accordance with GB/T 12220. The marking shall include the melting furnace number or the melting mark of the manufacturer.
(2) The marking may be applied to the nameplate only when it is not feasible to apply the required marking on the body. However, the arrow indicating the flow direction of the valve must be marked on the valve body.
(3) The nameplate shall be firmly fixed to a conspicuous position on the valve, and its content must be complete and correct. It shall also comply with the provisions of GB/T 13306 and its material shall be made of stainless steel, copper alloy or aluminum alloy.
(4) The paint used for color coding and marking shall not contain any harmful metals or metal salts, such as tin, zinc, lead, sulfur, copper or chloride, which may cause corrosion when hot, and the paint shall be resistant to corrosion in salt water, tropical environment or similar conditions.
(5) For small-sized objects that are difficult to mark, the method of stainless steel wire fastening stainless steel labels shall be used for marking.
4. Packaging
(1) After the valve passes the test, the oil and dirt on the surface shall be cleaned, and the residual test medium shall be removed from the inner cavity.
(2) Blind plates shall be used at both ends of the valve to protect the flange sealing surface, welding end or threaded end and the inner cavity of the valve. The blind plates shall be made of wood, wood fiberboard, plastic or metal, and fixed with bolts, steel clamps or locking devices.
(3) The valve shall be equipped with packing containing corrosion inhibitor or other high-quality packing that meets the design drawings and usage requirements, and the exposed threads (such as valve stems and pipes) shall be protected.
(4) Before shipment, the manufacturer shall properly package each device in accordance with GB/T13384 to prevent damage during transportation. The equipment shall be fixed to the bottom of the packaging box to prevent the equipment from shaking in the box during transportation.
(5) Each cargo container, crate, and packaging box must be marked with clear and readable transportation protection signs on the top or side or in other ways, such as waterproof, sunscreen, and no inversion. The center of gravity of the hoisting must be marked and strictly followed during loading and unloading.
(6) If there are special tools, they should be packaged separately and shipped together with the list of special tools. The equipment number and the words "special tools" should be marked on the outside of the packaging box.
(7) If the manufacturer provides spare parts, they should be packaged separately for long-term storage. At the same time, the spare parts should have necessary markings for future identification.
(8) If necessary, equipment and parts that are susceptible to damage by water and moisture should be provided with additional protection. Parts with non-drainable gaps or voids should be covered to prevent water and debris from entering during the entire transportation process.
5. Transportation
(1) The opening and closing parts of ball valves and plug valves should be in the open position, the opening and closing parts of other valves should be in the closed position, and the opening and closing parts of check valves should be in the closed position and fixed.
(2) Valves should be packaged for shipment. All types of valves with a nominal size less than DN40 should be packed for shipment. All types of valves with a nominal size not less than DN50 can be packed in bulk or in other ways except as specified in the contract, but it must be ensured that no parts will be damaged or lost during normal transportation.
(3) For land transportation, the packaging box should be placed in a windproof and rainproof boxcar. The manufacturer should cover it with rainproof canvas. If it is transported by sea, measures should be taken to prevent the internal and external surfaces of the equipment from being corroded by salt spray in the marine environment.
(4) The transportation packaging should be complete and neat. The goods inside should be evenly distributed, neatly arranged, properly padded, fixed inside, and the center of gravity should be as low as possible in the middle.
(5) Wooden boxes loaded on trucks and ships must be fixed to prevent damage to the integrity of the boxes due to vibration during transportation.
(6) Safety should be paid attention to during loading and unloading. Lifting equipment should not be used to lift objects that exceed their rated load.
(7) If there are lifting and handling positions marked on the outside of the packaging box, they must be strictly enforced to prevent accidental damage to the valve.
(8) Export valves should be shipped in containers as much as possible.
(9) Valves should be accompanied by product certificates, product instructions and packing lists when leaving the factory.