• 356mm7.8mm JIS G 3429 STH12 seamless carbon steel pipe for gas cylinder tube

IMRI is a manufacturer of gas cylinders. The Japanese standard JIS G 3429 includes STH11 STH12 and ect. IMRISTEEL’s gas cylinder tube, with complete specifications varying from 38mm(2 in.)to 457mm(18 in.) and uniform wall thickness, is available in the South American and European markets. We can offer you best products with good service and efficient delivery. If you are looking for a long term gas cylinder supplier in China, IMRI must be your first choice. Welcome to contact [email protected] to get a best quote today!

Specifications

Standard JIS G 3429
Steel Grade/Material STH11 STH12 STH21 STH22 STH31
Outer Diameter(OD) 1 1/2”-28”(38mm-720mm)
Wall Thickness(WT) 2.6mm-60mm
Length 5.8-16m or OEM
Packing PE,BE,Plastic cap or bundling
Surface Treatmengt Black paint,3LPE,3lPP,FBE…OEM
Section Shape Round
Technique Seamless hot rolled
Application Gas field
Sour service No
Place of Origin China
MOQ 25 ton
Transportation 1.Sea port:Tianjin Xingang port,Qingdao port,Shanghai Luojing port
→America,Europe,Africa,Middle East,India, Pakistan,Japan,Korea,
Australia…(shipping)

2.Land port:Alataw pass port(Пограничный пункт “Алашанькоу”)
Khorgos port(Пограничный пункт “Хоргос”)
→East Asia, Uzbekistan,Kazakhstan,Kyrgyzstan…(Train)
Erlianhot port→Mongolia(Train and Truck)
Manchuria port→Russia(Train and Truck)

Standard Grade Chemical Composition
C Si Mn P、S Ni Mo Cr
JIS   G3429 STH 11 ≤0.50 0.10 – 0.35 ≤1.80 ≤0.035 / / /
STH 12 0.30 – 0.41 0.10 – 0.35 1.35 – 1.70 ≤0.030 / / /
STH 21 0.25 – 0.35 0.15 – 0.35 0.40 – 0.90 ≤0.030 ≤0.25 0.15 – 0.30 0.80 – 1.20
STH 22 0.33 – 0.38 0.15 – 0.35 0.40 – 0.90 ≤0.030 ≤0.25 0.15 – 0.30 0.80 – 1.20
STH 31 0.35 – 0.40 0.10 – 0.50 1.20 – 1.50 ≤0.030 0.50 – 1.00 0.30 – 0.60 0.15 – 0.25
Tolerances on outside Diameter, wall thickness, wall thickness disparity and length of tube
Tolerance on outside Diameter Tolerance on wall thickness Tolerance on wall thickness disparity Tolerance on length
1% 30 Within 20% of the nominal wall thickness +30mm
0% 0

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