Pipe size (Inch and metric comparison table)
Inches are length units. 1 inch = 2.539999918 cm (cm). Inches or [吋] is used in the United Kingdom (UK, the United Kingdom (Commonwealth) length unit. It is also used in countries such as the United States. In Taiwan and Hong Kong, "inch" is usually written as "吋". The common abbreviation for inches is [ In] or ["] "吋" is a newly created word in modern times. It is pronounced "inch". It is a word that reads two words in Chinese characters. Others such as "浬" are pronounced "海里", etc., borrowing Chinese traditional length units. "Inch", and add aside to show the difference.
First, the size:
DN15 (4 in charge), DN20 (6 in charge), DN25 (1 inch tube), DN32 (1 inch 2 tube), DN40 (1 inch half tube), DN50 (2 inch tube), DN65 (2 inch half tube), DN80 (3 inch tube), DN100 (4 inch tube), DN125 (5 inch tube), DN150 (6 inch tube), DN200 (8 inch tube), DN250 (10 inch tube), etc.
Second, divide 1 inch into 8 equal parts:
1/81/43/81/25/83/47/8 inches.
This is equivalent to the usual one-to-one to seven-point pipe. The smaller size is expressed in 1/16, 1/32, 1/64, and the unit is still inches. If the denominator and the molecule can be divided (eg, the molecules are 2, 4, 8, 16, 32), they should be approximated.
The inch is indicated by two inches in the upper right corner, such as 1/2"
For example, the water pipe of DN25 (25mm, the same below) is the British 1" water pipe, which is also the previous 8 pipe.
The DN15 water pipe is an inch 1/2" water pipe, which is also the previous 4 water pipe.
For example, the DN20 water pipe is an inch 3/4" water pipe, which is also the previous 6 water pipe.
The relationship between the outer diameter and DN, NB is as follows:
Pipe fitting standard
Current national standard
GB/T10752-1995 marine steel pipe butt welding head
GB/T12772-1999 Flexible interface cast iron pipe and fittings for drainage
GB/T8803-2001 injection molding of rigid polyvinyl chloride (PVC-U), chlorinated polyvinyl chloride (PVC-C), acrylonitrile-butadiene-styrene terpolymer (ABS) and acrylonitrile-benzene Ethylene-acrylate terpolymer (ASA) pipe fitting hot oven test method
GB/T8802-2001 Determination of Vicat softening temperature of thermoplastic pipes and fittings
GB/T18251-2000 Method for determination of pigment or carbon black dispersion in polyolefin pipes, tubes and compounds
GB/T18474-2001 Test method for cross-linking degree of cross-linked polyethylene (PE-X) pipes and fittings
GB/T18475-2001 Thermoplastic pressure pipes and fittings for the classification and naming of the overall use (design) coefficient
GB/T18742.3-2002 Polypropylene piping systems for hot and cold water - Part 3: Pipe fittings
GB/T18991-2003 Thermoplastic pipes and fittings for hot and cold water systems
GB/T18993.3-2003 Chlorinated polyvinyl chloride (PVC-C) piping systems for hot and cold water - Part 3: Pipe fittings
GB/T18998.3-2003 Industrial chlorinated polyvinyl chloride (PVC-C) piping systems - Part 3
GB/T19228.3-2003 rubber O-ring seal for stainless steel clamp pipe fittings
GB/T19278-2003 General terminology and definition of thermoplastic pipes, fittings and valves
GB/T19473.3-2004 Polybutene (PB) piping systems for hot and cold water - Part 3: Pipe fittings
GB/T12459-2005 steel butt welding seamless pipe fittings
GB/T19712-2005 plastic pipe and fittings polyethylene (PE) saddle bypass impact test method
GB15558.2-2005 Gas-filled polyethylene (PE) piping systems - Part 2: Pipe fittings
GB/T13663.2-2005 Polyethylene (PE) piping systems for water supply - Part 2: Pipe fittings
GB/T19806-2005 extrusion pipe peeling test of plastic pipe and fittings polyethylene electrofusion assembly
GB/T19807-2005 Preparation of plastic pipe and pipe fittings for polyethylene pipe and electrofusion pipe fittings
GB/T19808-2005 Tensile Peel Test of Polyethylene Electrofusion Assembly with Nominal Outer Diameter of Plastic Pipe and Fittings Greater than or Equal to 90mm
GB/T19809-2005 Preparation of hot-melt butt joints for plastic pipes and fittings polyethylene (PE) pipe/pipe or pipe/pipe fittings
GB/T19810-2005 Determination of tensile strength and failure mode of polyethylene (PE) pipes and fittings hot-melt butt joints
GB/T13401-2005 steel plate butt welded pipe fittings
GB/T19993-2005 Thermoplastic circulating pipe system tubular pipe fitting system thermal cycle test method for hot and cold water
GB/T5836.2-2006 rigid polyvinyl chloride (PVC-U) pipe fittings for building drainage
GB/T15819-2006 Test methods and technical requirements for environmental stress cracking susceptibility of polyethylene (PE) pipes for irrigation from plug-in fittings
GB/T20201-2006 irrigation polyethylene (PE) pressure pipe mechanical connection pipe fittings
GB/T20207.2-2006 Acrylonitrile-butadiene-styrene (ABS) pressure piping systems - Part 2
GB/T20674.2-2006 Plastic pipes and fittings - Polyethylene system welding equipment - Part 2
GB/T20674.1-2006 Plastics pipes and fittings - Polyethylene system welding equipment - Part 1
GB/T8801-2007 hard polyvinyl chloride (PVC-U) pipe fittings falling test method
GB/T21300-2007 Determination of opacity of plastic pipes and fittings
GB/T21409-2008 General rules for the inspection, installation and use of glass equipment, pipes and fittings
GB/T21408-2008 versatility and interchangeability of glass equipment, pipes and fittings from 15mm to 150mm caliber pipes and fittings
GB/T14383-2008 forged socket welding and threaded pipe fittings
&n
Author:
Ms. Sunny Peng
Phone/WhatsApp:
+8618333120628
September 13, 2022
September 13, 2022
September 09, 2022
September 09, 2022
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Author:
Ms. Sunny Peng
Phone/WhatsApp:
+8618333120628
September 13, 2022
September 13, 2022
September 09, 2022
September 09, 2022