1. Scope   The Japanese Industrial Standard specifies the stainless steel pipes (hereafter referred tp as "pipes") used for the pipings for corrosion resistance, low temperature sevice, high temperature service, etc.
 Remarks
   1. With previous agreement with the manufacturer, the purchaser may designate a part or all of the special quality requirements of Z2, Z3, Z4, Z6 and Z7 specified in Annex, in addition to the items specified in this text.
     Annex Z2 Elevated temperature yield point or proof stress
     Annex Z3 Ultrasonic examination
     Annex Z4 Eddy current examination
     Annex Z6 Corrosion test
   2. The standards cited in this Standard are shown in Attached Table 3.

2. Grade and symbol Pipes shall be classified into 29 grades, and their symbols shall be as given in Table 1.

Table 1 Grade and symbol

Classification		Symbol of grade	Solution treatment ℃
Austenitic pipes	SUS 304	SUS304TP	1010 min. rapid cooling
	SUS 304H	SUS304HTP	1040 min. rapid cooling
	SUS 304L	SUS304LTP	1010 min. rapid cooling
	SUS 309	SUS309TP	10300 min. rapid cooling
	SUS 309S	SUS309STP	1030 min. rapid cooling
	SUS 310	SUS310TP	1030 min. rapid cooling
	SUS 310S	SUS310STP	1030 min. rapid cooling
	SUS 316	SUS316TP	1010 min. rapid cooling
	SUS 316H	SUS316HTP	1040 min. rapid cooling
	SUS 316L	SUS316LTP	1010 min. rapid cooling
	SUS 316Ti	SUS316TiTP	920 min. rapid cooling
	SUS 317	SUS317TP	1010 min. rapid cooling
	SUS 317L	SUS317LTP	1010 min. rapid cooling
	SUS 836L	SUS836LTP	1030 min. rapid cooling
	SUS 890L	SUS890LTP	1030 min. rapid cooling
	SUS 321	SUS321TP	920 min. rapid cooling
	SUS 321H	SUS321HTP	Cold-finished 1095 min, rapid cooling
			Hot-finished 1050 min, rapid cooling
	SUS 347	SUS347TP	980 min, min
	SUS 347H	SUS347HTP	cold-finished 1095 min, rapid cooling
			Hot-finished 1050 min, rapid cooling
Austenitic-ferritic pipes	SUS 329J1	SUS329J1TP	950 min, rapid cooling
	SUS 329J3L	SUS329J3LTP	950 min, rapid cooling
	SUS 329J4L	SUS329J4LTP	950 min, rapid cooling
Ferritic pipes	SUS 405	SUS405TP	Annealing 700 min, aricooling or slow cooling
	SUS 409L	SUS409LTP	Annealing 700 min, aricooling or slow cooling
	SU S430	SUS430TP	Annealing 700 min, aricooling or slow cooling
	SUS 430LX	SUS430LXTP	Annealing 700 min, aricooling or slow cooling
	SUS 430J1L	SUS430J1LTP	Annealing 720 min, aricooling or slow cooling
	SUS 436L	SUS436LTP	Annealing 720 min, aricooling or slow cooling
	SUS 444	SUS444TP	Annealing 700 min, aricooling or slow cooling

* World Standard Comferenc Table

3. Method of manufacture

4. Chemical composition Table 3

5. Mechanical properties

6. Hydraulic test characteristic or nondestructive examination characteristic
Pipes shall be tested in accordance with 10.6 and the resulted hydreulic test characteristic or nondestructive examination characteristic shall conform to either of the following requirements. The preference is committed to the specification by the purchaser or the discretion of the manufacturer.
  6.1 Hydraulic test characteristic Pipes shall withstand, without leakage, the hydraulic pressure designated, if any, by the purchaser, or in absence of it the hydraulic pressure specified in Attached Table 1. In this case, the purchaser may specifiy a hydraulic pressure higher or lower than those in Attached Table 1.
In the case where the hydraulic test is conducted by the specification of the purchaser and the test pressure exceeds either of the value P calculated from the following formula or 20 MPa and in 1 MPa for 10 MPa or over. IN calculation, the value P in the following formula shall be obtained and rounded off to 0.5 MPa or 1MPa.

                 P=200st / D

where
  P : test pressure[ kgf/㎠{10^-1bar(²)]
   t : wall thickness of pipe(mm)
  D : outside diameter of pipe (mm)
  s : 60 % of the minimum value of proof stress specified in Table 3 [kgf/mm²{N/mm²}]
    Note (²) 1bar = 10⁵Pa  

  6.2 There shall be no signal equal to or greater than the signals produced by the artificial flaws of the reference test piece of the working sensitivity division UD specified in JIS G 0582.
There shall be no signal equal to or greater than the signals produced by the artificial flaws of the reference test piece of the working sensitivity division EY specified in JIS G 0583

7. Appearance
  7.1 Pipes shall be straight for practical purposes, and their both ends shall be at right angles to the axis.
  7.2 The inside and outside surfaces of the pipes shall be well finished, and free from defects detrimental to practical use.

8. Dimensions, mass and dimensional tolerances

9. Tests

10. Inspection
  10.1 General matters common to inspection shall be as specified in JIS G 0303.
  10.2 The chemical composition shall conform to the requirements specified in 4.
10.3 The mechanical properties shall conform to the requirements specified in 5.
  10.4 The austenitic grain size number of SUC321HTP shall conform to the requirements specified in 6.
  10.5 The hydraulic test characteristic or nondestructive examination characteristic shall conform to the requirements specified in 7. However, the nondestructive examination may be replaced by other appropriate nondestructive examinations other than 10.6.3 subjected to the agreement between the purchaser and supplier.
10.6 The dimensions shall conform to the requirements specified in 8.
10.7 The appearance shall conform to the requirements specified in 9.
10.8 When the special quality requirements given in Annex are specified subjected to the agreement between the purchaser and supplier, the results of inspection shall conform to the relevant requirements specified in Z2, Z3, Z4, Z6 and Z7.

11.Reinspection    Pipes may be determined for acceptance or rejection by carrying out the retest specified in 4.4 of JIS G 0303.

12. Marking   Each pipe having passed the inspection shall be marked with the following items. However, in the case of either small pipes or a requirement from the purchaser, the pipes may be bundled and marked for each bundle by a suitable means. In either case, the order of arranging the items is not specified.
When approved by the purchaser, a part of the items may be omitted.
  (1) Symbol of grade
  (2) Symbol indicating the manufacturing mehtod(³)
  (3) Dimension (⁴)
  (4) Manufacturer;s name or abbreviation
  (5) Symbol Z indicating the special quality requirement
Note(³)
  The symbols indicating the manufacturing method shall be as follows. However, the sign of dash may be replaced by a space.
Hot-finished seamless pipe -S-H
Cold-finished seamless pipe -S-C
Automatic arc welded pipe -A
Cold-finished automatic arc welded pipe -A-C
Weld zone work finished automatic arc welded pipe -A-B
Laser welded pipe -L
Cold-finished laser welded pipe -L-D
Weld zone work finished laser welded pipe -L-B
Electric resistance welded pipe other than hot-finished or cold finished ones -E-G
Cold-finished electric resistance welded pipe -E-C
Note (⁴)
  The dimensions shall be indicated as follows
Nominal diameter X nominal wall thickness, outside diameter X wall thickness or nominal diameter X wall thickness
  Example : 50A × Sch 10S

13. Report   The manufacturer shall, as a rule, submit to the purchaser the report on the test results, method of manufacture, ordered dimensions, quantity, and work lot number traceable to the manufacturing condition, etc.

Clean Stainless Tube