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1、JIS Cr8380 93 4933b08 0537234 269 O J IS UDC 669.14-462:678.5/.8:621.315.221 JAPANESE INDUSTRIAL STANDARD Plastic coated steel pipes for ca bl e-ways JIS C 8 3 8 0 - 1 9 9 3 Translated and Published bY Japanese Standards Association Printed in Japan 7s Copyright Japanese Standards Association Provid
2、ed by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:38:06 MDTNo reproduction or networking permitted without license from IHS -,-,- In the event of any doubt arising, the original Standard in Japanese is to be final authority. Copyright
3、Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:38:06 MDTNo reproduction or networking permitted without license from IHS -,-,- 1 UDC 669.14-462:678.5/.8:621.315.221 JAPANESE INDUSTRIAL STANDARD J
4、 I S Plastic coated steel pipes .for cable-ways C 8380-1993 1. Scope This Japanese Industrial Standard specifies plastic coated steel pipes for cable-ways which are mainly used in general cable installation works, and in underground cable-ways of duct system and conduit system, to protect the cables
5、 (hereafter referred to as “coated steel pipes“). Remarks: The following Standards are cited in this Standard: JIS A 1415 Recommended practice for accelerated artificial exposure of plastics building materials JIS B 0204 Screw threads for rigid metal conduits and fittings JIS B 4751 Hand hacksaw bla
6、des JIS C 8305 Rigid steel conduits JIS G 3132 Hot-rolled carbon steel strip for pipes and tubes JIS G 3141 Cold rolled carbon steel sheets and strip JIS G 3444 Carbon steel tubes for general structural purposes JIS S 6006 Pencils and coloured pencils JIS Z 1522 Pressure sensitive adhesive cellophan
7、e tapes JIS Z 2371 Methods of neutral salt spray testing JIS Z 8401 Rules for rounding off of numerical values 2. Definitions definitions apply: For the purposes of this Standard, the following principal cable-way switchyard, similar places, and electric service places; and the structures which supp
8、ort or protect such wires. underground cable-way ground, and there are conduit system, duct system and direct laying system as the installation procedures. conduit system pressure due to vehicles or other heavy things are employed to accommodate the cables, and underground cable boxes (manholes or t
9、he like) are installed on the route and the ends of the cable-way. duct system ture which withstands the load resulted from the pressure of vehicles or other heavy things and which has a space to install the cables. direct laying system A system to install cables under the ground with the cables bei
10、ng accommodated in such cable protector as trough, or with the top being protected by plates. This means the wires between power station, substation, This means the cable-way installed under the This is such a system that conduits which withstand the Such a system that the cables are accommodated in
11、 a struc- Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:38:06 MDTNo reproduction or networking permitted without license from IHS -,-,- JIS CS8380 93 = 4933608 0537237 T78 Classificati
12、on Coated steel pipe whose inside and outside surfaces are covered 2 C 8380-1993 Symbol LL (6) original pipe (7) covering The steel pipe before execution of covering or painting. To cover the original pipe with a synthetic resin by means of To cover the original pipe with a paint by means of spray c
13、oat- fluidized immersion method, extrusion molding method, etc. ing, brush coating, etc. (8) painting Coated steel pipe whose outside surface is covered and inside surface is painted 3. Classification and symbol pipes shall be as follows: (i) The classification and symbols of coated steel Coated ste
14、el pipes are classified and symbolized in accordance with the original pipe as shown in Table 1. Table 1. Classification and symbols of coated steel pipes according to original pipes Classification I Symbol LT Coated steel pipe employing the original pipe having the same outside diameter, thickness
15、and thread length as those of the thick rigid steel conduit of JIS C 8305 (hereafter referred to as “type G“) G Coated steel pipe employing the original pipe having the same outside diameter, thickness and thread length as those of the thin rigid steel conduit of JIS C 8305 (hereafter referred to as
16、 “type C“) Coated steel pipe employing the original pipe having the same outside diameter and thickness as those of the threadless rigid steel conduit of JIS C 8305 (hereafter referred to as “type E“) C E (2) Coated steel pipes are classified and symbolized in accordance with the covering or paintin
17、g as shown in Table 2. Table 2. Classification and symbols of coated steel pipes according to covering or painting 4. Performances 4.1 Bending property When the coated steel pipe is subjected to the test of 9.1, the bending property shall be such that the change of outside diameter falls within +20
18、% of the original outside diameter, that no cracks or fissures appears on the welded portion, and that no cracks, peeling off, or the like appears on the paint film or cover film. . Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User
19、=Wing, Bernie Not for Resale, 03/13/2007 07:38:06 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S C*8380 73 W 4733608 05172L8 904 3 C 8380-1993 4.2 Resistance to corrosion to the test of 9.2, no blister, peeling or rust shall appear on the surface. 4.3 Paint-film perf
20、ormance is treated with deterrent to rust by painting, is subjected to the test of 9.3, no break or scratch detrimental to service shall appear on the paint film. 4.4 Cover-film performance (1) Peeling property not peel off. When the covered or painted surface is subjected When the coated steel pipe
21、, whose inside surface The covered outside surface shall be as follows: When the test of 9.4 is carried out, the cover film shall (2) Resistance to burning When the test of 9.5 is carried out, the specimen shall comply with either of the following requirements: (a) (b) The specimen shall not burn. W
22、hen the specimen is ignited, the burning shall go out naturally within 30 s from removal of the flame. (3) Pinholes pinholes. When the test of 9.6 is carried out, the specimen shall show no (4) Resistance to weather When the test of 9.7 is carried out, the specimen shall show no blister, crack or fi
23、ssure on the cover film, no remarkable change or deterioration in color, either. Resistance to damage by shock continuity tester shall not operate. (5) When the test of 9.8 is carried out, the 5. Manufacturing methods The manufacturing methods shall be as given below. (i) The both ends of a coated s
24、teel pipe shall be cut perpendicular to the pipe axis and then chamfered. (2) Covering shall be carried out on the outside surface of a coated steel pipe to a thickness of 0.6 I O . 2 mm. e (3) Covering or painting shall be carried out on the inside surface of a coated steel pipe. The external threa
25、d(l) specified in JIS B 0204 shall be machined on both ends of coated steel pipes o f type G and type C, and the thread length shall be as given in Tables 3 and 4. However, the threads on both ends of coated steel pipes of type G and type C may be omitted subject to agreement be- tween the parties c
26、oncerned with acceptance. Note (l) (4) The inspection of threaded part is carried out similar to JIS B 0204. (5) Painting shall be carried out on the threaded parts of coated steel pipes. 6. diameter and mass tolerances on outside diameter and mass, shall be as stated below. Dimension, mass and thre
27、ad length, together with tolerances on outside The dimension, mass and thread length together with e Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:38:06 MDTNo reproduction or networkin
28、g permitted without license from IHS -,-,- J I S C*8380 93 m 4733608 0537237 840 m Nominal thickness mm 4 C 8380-1993 Unit Thread length mm kdm Max. Min. (i) (2) The dimension, mass and thread length together with tolerances on outside diameter and mass of original pipe shall be as shown in Tables 3
29、, 4 and 5. The length shall be 3660 mm and the tolerance thereon shall be k 5 mm. However, the length may be changed subject to agreement between the parties concerned with acceptance. Table 3. Dimension, mass and thread length together with tolerances on outside diameter and mass of type G original
30、 pipe 2.3 2.3 2.5 2.5 Outside G 16LL 21.0 f 0.3 G 16LT 1.06 19 16 1.37 22 19 1.90 25 22 2.43 28 25 G 22LL G 22LT G 28LL G 28LT G 36LL G 36LT 26.5 f 0.3 33.3 f 0.3 41.9 10.3 G104LT G 42LL G 42LT G 54LL G 54LT G 70LL G 70LT G 82LL G 82LT G 92LL G 92LT Notes (2) (9 (4) 47.8 I 0.3 59.6 f 0.3 75.2 k 0.3
31、87.9 f 0.3 100.7 f 0.4 2.8 2.8 2.8 3.5 3.92 32 28 5.00 36 32 5.88 40 36 8.39 42 36 2.5 1 2.79 1 28 1 25 3.5 I 9.48 I 45 I 39 I I I For this type designation, a combination of the symbol de- noting coated steel pipe classification according to original pipe, the designation specified in JIS C 8305 an
32、d the symbol denoting coated steel pipe classification according to covering or painting, is used. This indicates the mass of pipe not including the threaded parts. The tolerance on mass of one bundle (within 50 kg) of origi- nal pipes shall be -7 % and the plus side is not specified. The calculatio
33、n method for checking the tolerance on mass shall be such that the difference between the actually measured value and the calculated value is divided by the calculated value and this quotient is expressed in percent- age. The numerical value of mass shall be calculated from Copyright Japanese Standa
34、rds Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:38:06 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S Cr8380 93 Y933608 0517220 562 Type designation(*) 5 C 8380-1993 Outside diame
35、ter mm the formula given below by assuming 1 cm3 steel is 7.85 g and then rounded off to three significant figures according to JIS Z 8401. W = 0.024665 (D - 5 ) where, W : unit mass of original pipe (kg/m) D : outside diameter of original pipe (basic size) (mm) t : nominal thickness of original pip
36、e (mm) Table 4. Dimension, mass and thread length together with tolerances on outside diameter and mass of type C original pipe Nominal thickness mm Unit mas()() kglm c 19LL 19.1 f 0.2 C 19LT C 25LL 25.4 10.2 C 25LT 0.690 0.939 I lv6 I 1*19 C 31LL 31.8 k 0.2 C 31LT C 39LL 1 38.1 k 0.2 C 39LT 1.44 I
37、ls6 I lag4 C 51LL I 50.8 f 0.2 C 51LT C 63LL 63.5 f 0.35 2.0 3.03 C 63LT c 75LL 76.2 f 0.35 2.0 3.66 C 75LT Thread length mm Max. I Min. l4 I l2 l7 I l5 30 I 28 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for
38、 Resale, 03/13/2007 07:38:06 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S C88380 93 m 4733608 0537223 4T9 m Type designation(2) E 19LL E 19LT E 25LL E 25LT 6 C 8380-1993 Outside Nominal Unit masd4) diameter thickness mm mm kg/m 19.1 f 0.15 1.2 0.530 25.4 f 0.15 1.2
39、 0.716 Table 5. Dimension and mass together with tolerances on outside diameter and mass of type E original pipe E 39LL E 39LT 38.1 k 0.15 E 31LL I 31:8 f 0.15 E 31LT 1.05 76.2 10.25 1.8 3.30 E 51LL E 51LT E 63LL E 63LT E 75LL E 75LT 1.71 I 1*4 I 50.8 f 0.15 63.5 I 0.25 2.44 Appearance The coated st
40、eel pipe shall be practically straight. The inside and outside surfaces of coated steel pipe shall be smooth and well finished, and the inside surface shall especially be free from any projection or the like detrimental to service. The appearance of coated steel pipes shall be as follows: The covere
41、d or painted surface of coated steel pipe shall be free from any abnormality such as scratch, lift, flaw detrimental to service. Original pipe Pipes which are made from the steel strip of JIS G 3132 or JIS G 3141 or a strip at least equivalent by means of electric welding and are before the plating
42、specified in JIS C 8305. The tube of STK 290 specified in JIS G 3444. The original pipes shall be either of the following pipes: Tests Bending test 9.1.1 Specimen the specimen. 9.1.2 Test method specified in Table 6 by means of a roll bender or a push bender at ordinary tem- perature. bend. Cut the
43、coated steel pipe to a suitable length and use it as Bend the specimen through 90“ at the inside radius Place the welded part to a position about 45“ from the inside of the Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Be
44、rnie Not for Resale, 03/13/2007 07:38:06 MDTNo reproduction or networking permitted without license from IHS -,-,- JIS C+8380 93 W 4933bOB 0517222 335 Type E 7 C 8380-1993 E 19LL E 25LL E 19LT E 25LT Table 6. Bending test Classification I Designatiod2) I Inside radius of curvature G 16LL G22LL G28LL
45、 G 16LT G22LT G28LT C 19LL C 25LL C 19LT C 25LT 6 times outside diameter of coated steel pipe mition rate to the original outside diameter. e 9.2 Corrosion resistance test 9.2.1 Specimen cut open a half of the piece. Cover all the cut faces by pasting paint or wax to prepare the specimen. surface. C
46、ut the coated steel pipe to a length of about 150 mm, then Make the specimen so that the welded part lies almost in the middle of test 9.2.2 Test method The method shall be as specified in JIS Z 2371. Repeat two cycles of spraying; each cycle consisting of continuous spray of salt water for 8 h and
47、a rest of 16 h. Further, carry out the spraying for 8 h. 9.3 Test of paint film 9.3.1 Specimen the specimen. 9.3.2 Test method (i) Cut the coated steel pipe to a suitable length and use it as The test method of paint film shall be as follows: Sharpen the pencil of hardness H specified in JIS S 6006
48、as illustrated in Fig. 1 to form a plane at right angle to the lengthwise direction. e Fig. 1. Sharpening of pencil Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 07:38:06 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S C*8380 93 = 4933608 0517223 271 = 8 C 8380-1993 (2) Write a line in the direction shown in Fig. 2 with the pencil so prepared maintained at