{"Result":true,"List":[{"masterId":305,"ID":390,"pmcId":"0","pscId":"0","pdcId":"0","ppcId":"0","promLang":"EN","promSubject":"What is piping?","imagePdsFile":"","imagePdsFilename":"","thumnailFile":"https:\/\/dklok.com\/Upload\/promotion\/blog-thumnail-001.png","thumnailFilename":"blog-thumnail-001.png","attachedFile":"","attachedFilename":"","pressCenter":"","pressUrl":"","facebookUrl":"","linkedUrl":"","youtubeUrl":"","twitterUrl":"","exhibitionTerms":"","exhibitionPlace":"","exhibitionDivision":"","exhibitionWebsite":"","excerpt":"Piping is used to transport fluids such as water or gas, and while it is closely related to our daily lives, most of us rarely take \r\nthe time to observe or examine it closely. Unless there is an issue, such as a leak due to a burst pipe on an upper floor, we \r\nrarely even think of the word \"piping.\"","description":"\r\n\r\n\r\n
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\r\n
\r\n \r\n <\/div>\r\n
\r\n P<\/span>iping can be found everywhere in our daily lives. From water and sewage piping to boiler, electrical, and gas piping, \r\n entire buildings and even entire cities are built upon piping networks. In South Korea alone, there are approximately \r\n 46,000 kilometers of installed city gas pipelines and about 220,000 kilometers of water pipelines. <\/span><\/div>\r\n
\r\n | What is piping?<\/b>

\r\n

Piping materials \r\n are generally divided into two categories based on size: large pipes are referred to as \"pipes\" and smaller ones as \"tubes.\" \r\n While standards may vary slightly from country to country, most pipes and tubes are manufactured to internationally \r\n recognized sizes.\r\n <\/p>\r\n \r\n

For example, pipes follow dimensions specified in the Pipe Schedule Table, while tubes are measured in millimeters (mm). \r\n This standardization is aligned with the U.S.based ASTM standards, which use inch-based measurements, as shown in the \r\n table below.<\/p>\r\n\r\n

\r\n

Pipe and Tube Comparison<\/span><\/p>\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n
Categoty<\/th>\r\n Pipe (Schedule)<\/th>\r\n Tube (Dimension in mm)<\/th>\r\n <\/tr>\r\n <\/thead>\r\n
Measurement<\/td>\r\n Nominal Pipe Size (NPS) and Schedule (Sch)
\r\n determine diameter and wall thickness.<\/td>\r\n 		Actual Outside Diameter (OD) and wall thickness.<\/td>\r\n <\/tr>\r\n
Diameter
\r\n Definition<\/td>\r\n 		Refers to Nominal Pipe Size (NPS) rather
\r\n than the actual diameter. For example,
\r\n a 1\" NPS pipe has a larger OD than 1\".<\/td>\r\n 		The Outside Diameter (OD) is consistent with
\r\n the size designation, so a 1\" tube has a 1\" OD.<\/td>\r\n <\/tr>\r\n
Wall Thickness<\/td>\r\n Use Schedule No.<\/td>\r\n mm or inch<\/td>\r\n <\/tr>\r\n
Strength and
\r\n Pressure Rating<\/td>\r\n 		Higher schedules increase strength and
\r\n pressure rating due to Schedule(Sch).<\/td>\r\n 		Pressure rating varies, but tubes are often designed
\r\n for structural purposes and specific applications.\r\n <\/td>\r\n <\/tr>\r\n
Common
\r\n Application<\/td>\r\n 		Generally used in plumbing, fluid transport,
\r\n and process systems where pressure
\r\n containment is essential.<\/td>\r\n 		Often used in structural, medical, and mechanical
\r\n applications where precise dimensions are critical.\r\n <\/td>\r\n <\/tr>\r\n
Standard<\/td>\r\n ANSI, ASME<\/td>\r\n ASTM, ISO etc.<\/td>\r\n <\/tr>\r\n <\/tbody>\r\n <\/table>\r\n <\/div>\r\n\r\n


\r\n

Pipe Schedule Table and Dimension<\/span><\/p>\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n
Nominal Pipe
\r\n Size(NPS)<\/th>\r\n 		Diameter
\r\n Nominal(DN)<\/th>\r\n 		Outside
\r\n Diameter
\r\n in.(mm)<\/th>\r\n 		Wall Thickness (In, mm)<\/th>\r\n <\/tr>\r\n
Sch, 5s<\/th>\r\n Sch, 10s\/20<\/th>\r\n Sch 30<\/th>\r\n Sch 40s\/40\/STD<\/th>\r\n Sch 80s\/80\/XS<\/th>\r\n <\/tr>\r\n <\/thead>\r\n
1\/2<\/td>\r\n 15<\/td>\r\n 0.840, (21.34)<\/td>\r\n 0.065 (1.651)<\/td>\r\n 0.083 (2.108)<\/td>\r\n 0.095 (2.413)<\/td>\r\n 0.109 (2.769)<\/td>\r\n 0.147 (3.734)<\/td>\r\n <\/tr>\r\n
3\/4<\/td>\r\n 20<\/td>\r\n 1.050, (26.67)<\/td>\r\n 0.065 (1.651)<\/td>\r\n 0.083 (2.108)<\/td>\r\n 0.095 (2.413)<\/td>\r\n 0.113 (2.870)<\/td>\r\n 0.154 (3.912)<\/td>\r\n <\/tr>\r\n
1<\/td>\r\n 25<\/td>\r\n 1.315, (33.40)<\/td>\r\n 0.065 (1.651)<\/td>\r\n 0.109 (2.769)<\/td>\r\n 0.114 (2.896)<\/td>\r\n 0.133 (3.378)<\/td>\r\n 0.179 (4.547)<\/td>\r\n <\/tr>\r\n
1 1\/4<\/td>\r\n 32<\/td>\r\n 1.660, (42.16)<\/td>\r\n 0.065 (1.651)<\/td>\r\n 0.109 (2.769)<\/td>\r\n 0.117 (2.972)<\/td>\r\n 0.140 (3.556)<\/td>\r\n 0.191 (4.851)<\/td>\r\n <\/tr>\r\n
1 1\/2<\/td>\r\n 40<\/td>\r\n 1.900 (48.26)<\/td>\r\n 0.065 (1.651)<\/td>\r\n 0.109 (2.769)<\/td>\r\n 0.125 (3.175)<\/td>\r\n 0.145 (3.683)<\/td>\r\n 0.200 (5.080)<\/td>\r\n <\/tr>\r\n
2<\/td>\r\n 50<\/td>\r\n 2.375 (60.33)<\/td>\r\n 0.065 (1.651)<\/td>\r\n 0.109 (2.769)<\/td>\r\n 0.125 (3.175)<\/td>\r\n 0.154 (3.912)<\/td>\r\n 0.218 (5.537)<\/td>\r\n <\/tr>\r\n
2 1\/2<\/td>\r\n 65<\/td>\r\n 2.875 (73.03)<\/td>\r\n 0.083 (2.108)<\/td>\r\n 0.120 (3.048)<\/td>\r\n 0.188 (4.775)<\/td>\r\n 0.203 (5.156)<\/td>\r\n 0.276 (7.010)<\/td>\r\n <\/tr>\r\n
3<\/td>\r\n 80<\/td>\r\n 3.500 (88.90)<\/td>\r\n 0.083 (2.108)<\/td>\r\n 0.120 (3.048)<\/td>\r\n 0.188 (4.775)<\/td>\r\n 0.216 (5.486)<\/td>\r\n 0.300 (7.620)<\/td>\r\n <\/tr>\r\n <\/tbody>\r\n <\/table>\r\n <\/div>\r\n
\r\n \r\n<\/div>\r\n <\/div>\r\n


\r\n | How is Piping Manufactured?<\/b>

\r\n Seamless Pipe<\/b>

\r\n

Seamless pipes are manufactured without joints by extruding or drawing a solid metal block. During this process, the metal is\r\n heated to a high temperature and shaped into a cylinder to create a strong and durable pipe. Seamless pipes are produced \r\n from cylindrical metal ingots, which are heated, softened, and pierced in the center to form a hollow shape. These pipes, \r\n lacking welded seams, are ideal for high-pressure, high-temperature environments and are widely used in the chemical, \r\n petroleum, and gas industries.<\/p>

\r\n

Seamless Pipe Production<\/span><\/p>\r\n

\r\n \r\n <\/div>\r\n <\/div>\r\n

\r\n Seamless Tube<\/b>

\r\n

Seamless tubes are produced by further reducing the size of seamless pipes through a drawing process, resulting in a product \r\n that is sized in metric units rather than by pipe schedules. In this process, a die is used to apply intense pressure to reduce the \r\n outer diameter and adjust the inner diameter of the tube. The die, or mold, has one side larger and the other smaller, so the \r\n original-sized pipe is inserted from the larger end and drawn through to reduce its dimensions. This process may be repeated \r\n multiple times with varying die sizes to produce tubes of very small diameters.\r\n <\/p>\r\n

Adequate heat treatment is critical in this process, as inadequate heat can cause the tube to burst or tear during drawing, \r\n leading to product defects or even potential accidents in application.<\/p>
\r\n

Drawing Process<\/span><\/p>\r\n

\r\n \r\n <\/div>\r\n <\/div>\r\n\r\n


\r\n Welded Pipes and Tubes<\/b>

\r\n

Typically, flat sheets or coils of metal are used as raw materials, which are cut to the required size to create weldable forms. \r\n The cut metal sheets are rolled or bent using rolling or bending machines to achieve a cylindrical shape, forming the desired \r\n diameter and curvature in the process. Once the shaping is complete, the welding process begins. <\/p>

The edges of the formed \r\n pipe are welded together to ensure a sturdy connection. Various welding methods, such as arc welding, TIG welding, and \r\n MIG welding, are employed, with careful heat control and appropriate techniques applied to improve welding quality. \r\n <\/p>

\r\n

Weld Pipe\/Tube Production<\/span><\/p>\r\n

\r\n \r\n <\/div>\r\n <\/div>\r\n\r\n


\r\n | How is Fitting Manufactured?<\/b>

\r\n

So, how are fittings made? Fittings serve as connectors that join pipes or tubes, and thus are made from the same material as \r\n the pipes or tubes they connect. Fittings are created by cutting pipes or tubes to a specified length and adding threads or \r\n bevels to allow for secure connections or welding.<\/p>\r\n

Pipe fittings are often produced by heating pipes with high-frequency technology and bending them at desired angles. For \r\n fittings that require threaded finishes, such as those for instrumentation equipment, CNC machining centers are used to \r\n precisely carve out the threads.<\/p>\r\n \r\n More about Tube Fittings <\/a>\r\n

\r\n
\r\n \r\n

High-Frequency Bending<\/span><\/p>\r\n <\/div>\r\n

\r\n \r\n

CNC Machining<\/span><\/p>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n\r\n

\r\n | DK-Lok\u2019s Advanced Process<\/b>

\r\n

DK-Lok has implemented robotic systems in its production lines to achieve an automated manufacturing line. By equipping \r\n the machining area with robot arms supplied by Hyundai Robotics, the company has established a system capable of high-\r\n speed material transfer. \r\n <\/p>\r\n

This automation has resulted in a 42% increase in production efficiency and a reduction in defect rates by over 40%. DK-Lok \r\n is dedicated to production automation to quickly handle worldwide orders, establishing a competitive edge through rapid \r\n delivery.\r\n <\/p>\r\n

\r\n
\r\n \r\n <\/div>\r\n
\r\n \r\n <\/div>\r\n <\/div>\r\n

Production Line with Robotic Transfer System<\/span><\/p>\r\n <\/div>\r\n <\/div>\r\n\r\n

\r\n <\/span>\r\n

\r\n DK-Lok Corporation holds all rights to the materials provided by DK-Lok Corporation. (hereinafter referred to as \"DK-Lok Corporation. materials\")\r\n <\/p>\r\n

\r\n and these materials are protected by copyright law. Unauthorized reproduction and distribution of materials provided on the web service are generally prohibited.\r\n <\/p>\r\n

\r\n
COPYRIGHT\u00a9 DK-Lok Corporation. ALL RIGHTS RESERVED.\r\n <\/p>\r\n\r\n