JIS G3469 Polyethylene coated Steel Pipes.pdf
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1、 JIS G3469 Polyethylene coated Steel Pipes (JIS G 3469 / JISG3469) 1. Scope This Japanese Industrial Standard specifies the external polyehylene coated steel pipes, hereinafter referred to as the “coated steel pipes“, mainly used for underground(1) services transporting gas, oil, water, etc. Note(1)
2、 The underground referred to herein includes the bottoms of river, sea, etc. Remarks The standards cited in this Standard are as follows. 2. Classification The coated steel pipes shall be classified into 3 classes, and their symbols shall be as given in Table 1. Table 1 Classification Symbol of clas
3、s Polyethylene Undercoat Application P1H First layer Adhesive Straight pipe P2S Second layer Gluing agent Straight pipe P1F First layer - Deformed pipe Remarks 1. Subject to the agreement between parties concerned with delivery, gluing agent on the first layer and adhesive on the second layer can be
4、 applied respectively. The symbols of calss thereof shall be P1S and P2H respectively. 2. The outer layer of polythylene used for P2S shall be for the purpose of packaging. * World Standard Comferens Table KS JIS ASTM DIN BS Grade number Polyethylene Undercoat Application GRADE Grade number GRADE -
5、- - First layer Adhesive Straight pipe P1H P1H - - - Second layer Gluing agent Straight pipe P2S P2S - - - D 3589 First layer - Deformed pipe P1F G-3469 P1F - - - 3.1 Appearance The coating shall stick wall to the steel surface and be free from harmful flaws, unevenness, mingling of foreign subatanc
6、es, etc. 免费标准下载网( w w w . f r e e b z . n e t ) 免费标准下载网( w w w . f r e e b z . n e t ) 无需注册, 即可下载 3.2 Shape and dimension The shape and dimensions shall be as follows (1) The nominal dimeters shall be expressed by the nominal diameters of the original pipes(2). (2) The position and shape of coating
7、at both pipe ends, shall be, unless otherwise specified, as shown in Table 2. In case of plain ends, however, it shall be agreed between the parties concerned with delivery. (3) The maximum outside diameter of coated steel pipes using mechanical couplings may be specified by the purchaser upon agree
8、ment with the manufacturer. Note(2) The original pipes signify both straight and deformed pipes before coating. Table 2 Position and shape of coating at pipe end Unit :mm Shape of pipe end Position and shape of coating at pipe end Threaded Bevel Flanged(3) Note(3) In the case of mounting flanges to
9、the pipes after coating, it shall be agreed upon between the parties concerned with delivery. 3.3 Thickness of coating The coating thickness and its tolerances for each nominal diameter of the coated steel pipes shall be subjected to the test specified in 6.1 and shall conform to Table 3. The thickn
10、ess of coating of P1H to be used with threaded couplings, however, may be specified upon agrement between the parties concerned with delivery. The Standard is downloaded from Standard Sharing 免费标准下载网( w w w . f r e e b z . n e t ) 免费标准下载网( w w w . f r e e b z . n e t ) 无需注册, 即可下载 3.4 Pinholes The c
11、oated steel pipe shall be free from defects which generate sparks, when pinhole-tested as specified in 6.2. 3.5 Peeling strength The coated steel pipes P1H and P1F shall be subjected to the test specified in 6.3 and shall show the strength of 35 N/10 mm width and over. Table 3 Thickness of polyethyl
12、ene coating and its tolerance Unit mm P1H(4) and P1F P2S Coating Coating Packing jacket (Informative reference) Nominal diameter A Thickness Tolerance Nominal diameter A Thickness Tolerance Thickness Tolerance 15 1.5 15 0.6 1.0 20 1.5 20 0.6 1.0 25 1.5 25 0.6 1.0 32 1.5 32 0.6 1.0 40 1.5 40 0.6 1.0
13、50 1.5 50 0.6 1.0 65 1.5 65 0.6 1.0 80 1.5 80 0.6 1.0 90 1.5 +Not specified -0.3 90 0.6 1.0 100 2.0 100 0.8 1.1 125 2.0 125 0.8 +Not specified -0.2 1.1 150 2.0 +Not specified -0.4 150 0.9 1.2 +Not specified -0.3 200 2.5 200 1.1 1.5 250 2.5 250 1.2 1.6 300 2.5 300 1.2 1.7 +Not specified -0.4 350 2.5
14、350 1.2 2.0 400 2.5 400 1.2 +Not specified -0.3 2.0 450 2.5 450 1.3 2.0 500 2.5 +Not specified -0.5 500 1.3 +Not specified 2.0 +Not specified -0.5 免费标准下载网( w w w . f r e e b z . n e t ) 免费标准下载网( w w w . f r e e b z . n e t ) 无需注册, 即可下载 550 2.5 550 1.3 2.0 600 2.5 600 1.3 2.0 650 2.5 650 1.3 2.0 700
15、2.5 700 1.3 2.0 750 2.5 750 1.3 2.0 800 2.5 800 1.3 -0.4 2.0 850 2.5 900 2.5 1000 2.5 1100 3.0 1200 3.0 1350 3.0 1500 3.0 1600 3.0 1800 3.0 2000 3.0 4.1 original pipes 4.1.1 The original pipes to be used for the coated steel pipes shall be in accordance with either Table 4 or 5. If original pipes ot
16、her than those given in Tables 4 and 5 are required, it shall be as agreed upon between the parties concerned with delivery. Table 4 Straight pipes Nominal diameter A Straight pipes 152000 JIS G 3452 JIS G 3454 JIS G 3457 Table 5 Deformed pipes The Standard is downloaded from Standard Sharing 免费标准下
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