Concentric Different-diameter Pipe

We are instrumental in providing to our valuable customers excellent quality Concentric Different-Diameter Pipe which is available with following specification:-
* Manufacturing standards:
According to GB/T12459, GB/T13401, HG/T21635, HG/T21631, SY5010, SH3408, SH3409, ASME/ANSI, B16.9 JIS B2311/2312/2313, DIN2605/2615/2616/2617, the standard production.

* Size range:
Seamless from DN15 to (1/2 "~ 24" pressure levels SCH5S ~ SCH160S
Have to sew the maximum 2 from DN15 production area than DN1800 1/2 "~ 48" the maximum production range than 72 "pressure levels SCH5S ~ SCH160S
(if there is non-standard products, customers can request the to chart production)

* Material:
But according to ASTM, JIS, DIN, GB standard
ASTM: 304, 304 L, 316 L, 316,, and 316 Ti, 317, 317 L, 321, 321 H, etc
JIS: SUS304, SUS304L, SUS316 SUS316L, SUS316Ti, SUS317L, SUS321, SUS321H, etc
DIN: 1.4301, 1.4306, 1.4401, 1.4435, 1.4571, 1.4436, 1.4438, 1.4541, etc
GB: 0 Cr18N9, 00 Cr19Ni10,