GB/T 31940 Stainless Steel Tube Bi-Metal Composite Corrosion Resistance For Fluid Transportation
Contact Person : Richard SHEN
Phone Number : +86-13736164628
WhatsApp : +8613736164628
|Minimum Order Quantity :||1 Tons||Price :||negotiable|
|Packaging Details :||In wooden boxes||Delivery Time :||30-35 Days|
|Payment Terms :||D/A, L/C, D/P, T/T, Western Union, MoneyGram||Supply Ability :||50000Tons/Years|
|Place of Origin:||China||Brand Name:||TORICH|
|Certification:||ISO 9001,ISO 14001,TS 16949||Model Number:||ASTMA358|
|Product Name:||A358 / A358M High Temperature Inconel Electric Fusion Welded Steel Tubes||Key Word:||Stainless Steel Pipes|
|Length:||1-12m||Payment:||L/C T/T D/P D/A|
stainless steel round tube,
large diameter stainless steel tube
316L, 317, 317L, 321, 321H, 348
The joints are full penetration bouble-welded or single-welded
All pipes are with heat treatment condition.
Please specify your heat treatment requirement in the enquiry.
Permissible Variations—The dimensions at any point in a length of pipe shall not exceed the following:
Outside Diameter—Based on circumferential measurement, 60.5 % of the specified outside diameter.
Out-of-Roundness—Difference between major and minor outside diameters, 1 %.
Alignment—Using a 10-ft [3-m] straightedge placed so that both ends are in contact with the pipe, 1⁄8 in. [3 mm] deviation from contact with the pipe.
Thickness—The minimum wall thickness at any point in the pipe shall not be more than 0.01 in. [0.3 mm] under the nominal thickness.
Table 1 Annealing Requirements
|Grade or UNS DesignationA||
All grades not individually listed below:
|1900 °F [1040 °C]||C|
|1900 °F [1040 °C]||D|
|N08020||1800-1850 °F [980-1010 °C]||D|
|N08367||2025 °F [1110 °C]||D|
|N08810||2050 °F [1120 °C]||D|
|N08904||2000 °F [1095 °C]||D|
|N08926||2010 °F [1100 °C]||D|
|S30600||2100 °F [1150 °C]||D|
|S30815||1920 °F [1050 °C]||D|
|S31254||2100 °F [1150 °C]||D|
|S31266||2100 °F [1150 °C]||D|
|S31727||1975–2175 °F [1080 to 1180 °C]||D|
|S32050||2100 °F [1150 °C]||D|
|S32053||1975–2175 °F [1080 to 1180 °C]||D|
|S32654||2100 °F [1150 °C]||D|
|S34565||2050 °F [1120 °C]||D|
A New designation established in accordance with Practice E527 and SAE J1086.
B Minimum, unless otherwise stated.
C Quenched in water or rapidly cooled by other means, at a rate sufficient to prevent reprecipitation of carbides, as demonstrable by the capability of passing Practices
A262, Practice E. The manufacturer is not required to run the test unless it is specified on the purchase order (see Supplementary Requirement S7). Note that Practices
A262 requires the test to be performed on sensitized specimens in the low-carbon and stabilized types and on specimens representative of the as-shipped condition for
other types. In the case of low-carbon types containing 3 % or more molybdenum, the applicability of the sensitizing treatment prior to testing shall be a matter for
negotiation between the seller and the purchaser.
D Quenched in water or rapidly cooled by other means.
Inspection and Quality Control:
In house control, also accept Customer Inspection at site or Third Party Inspection
ASTM A240/A240M Specification for Chromium and Chromium Nickel Stainless Steel Plate, Sheet, and Stip for Pressure Vessel and for General Application
ASTM A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels
ASTM A480/ A480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
ASTM A941 Terminology Rlating to Steel, Stainless Steel, Related Alloys and Ferroalloys
ASTM A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe
E527 Practice for Numbering Metals and Alloys (UNS)
1~ Incoming Raw Material Inspection
2~ Raw Material Segregation to avoid steel grade mix-up
3~ Heating and Hammering End for Cold Drawing
4~ Cold Drawing and Cold Rolling, on line inspection
5~ Heat Treatment, +A, +SRA, +LC, +N, Q+T
6~ Straightening-Cutting to specified length-Finished Measuring Inspection
7~ Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8~ Packing and Stocking.
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.