hot galvanizing pipe

pipes also called galvanized pipe:
1.ISO certification.
2.nontoxic.
3.surface treatment:galvanized
zonic plating pipes have the features below
The pipe adopts the cold zonic plating of high-quality Q235 and hot-quality Q195 to take the steel, was model by automatic welding of high , a degree is high, the wall is thick and even, the port is hairless to stab.The outside wall inside the tube all plates the zinc protection, the antisepsis ability is strong.Settle long 4 meterses generally, medium-sized tube, the φ 25 followings can curve, the φ is more than 32 can go together with prepare make curved head conjunction turn .
Specification:φ16 φ20,φ25,φ32,φ40,φ50
Specification
φ20
φ25
φ32
φ40
φ50
Outside path D
20
25
32
40
50
The outside path allows the deviation
0
-0.3
0
-0.3
0
-0.40
0
-0.40
0
-0.40
Thick S of wall
1.60
1.60
1.60
1.60
1.60
The wall is thick to allow the deviation
±0.15
±0.15
±0.15
±0.15
±0.15
Length L
4000
4000
4000
4000
4000
The length allows the deviation
±5.00
±5.00
±5.00
±5.00
±5.00

Note:where didn't mark the unit, is the mm