Specifications

321 2b stainless steel welded pipes
ISO9001:2008
1) Diameters: 4 -76.2mm
2) W.T.: 0.4 - 2.5mm
Raw material from POSCO

 

Raw material from POSCO

stainless steel tube for heat exchanger,evaporater,condenser,cooler,boiler,muffler
Specifications:
1) Diameters: 4 - 76.2mm
2) W.T.: 0.4 - 2.5mm
3) Grades: 316L/304/304L/310S,etc.

4)standard:GB/ISO/EN/ASTM/JIS,etc.

5)application range:widely use in the foodstuff,medical equipment,power,boiler,cooler,auto,condenser etc.

6)packing: inner packing:1 pc/plastic bag;outer packing:bundles in weaving bags or in plywooden case.

 

 

 

1,Size accuracy
The outside path admission deviation that solder take care of includes the elliptical park a cent Ⅰ , Ⅱ two class, see the table 3, table 4.

ⅠOutside path in class deviation mm table 3		Outside path inⅡ class deviation mm table 4
Outside path Admission deviation <25 ±0.10 ≥25~38.1 ±0.15 >38.1~50 ±0.20 ≥50~63.5 0.25 >63.5~76 ±0.30 ≥76~102 ±0.40		Outside path Admission deviation ≤10 ±0.15 >10~32 ±0.20 >32~50 ±0.30 >50 ±0.8%

The thick the deviation of admission( do not include the weld sew) in wall of the weld tube is for ruling the wall thick 10% of ±, but minimum admission deviation is the 0.02 mms of ±.
The weld takes care of of settle Chinese foot length as 3 ms~9 ms, general settle the Chinese foot with the 6 ms.

The weld takes care of of settle the Chinese foot length in usually length, its the deviation of admission is the 5 mms of ±.
Adopt partial the degree of flinch in a the tube of weldfor keeping the Chinese foot measurement should not very in 2.0 mms.
2,The machine function sees the table 5

table 5

Steel number	Card number	The heat handles Make degree	The anti- pulls the strength MPa	Accept defeat the strength MPa	Extension rate%	Degree of hardnessHRB
0Cr19N19	304	≥1010°C Nasty and cold	≥520	≥205	40	≤90
00Cr19Ni11	304L	" "	≥480	≥175	40	≤90
0Cr17Ni12M02	316	" "	≥520	≥205	40	≤90
0Cr17Ni14M02	316L	" "	≥480	≥175	40	≤90
0Cr18Ni11Ti	321	≥920°C Nasty and cold	≥520	≥205	40	≤90