Standards: A789 Specification for seamless and welded Ferritic/Austenitic stainless steel tubing for General Service

Item

Contents

Requirements

1

Materail

S31803, S32205, S32304, S32507 Etc

2

Welding Method

Seamless Or Automatic Welding Process With No Addition Of Filler Metal During The Welding Process

3

Chemical Composition

Acc.to A789 and A480

4

Heat Treatment

Annealing Acc.to Table 3 In ASTM A789

5

Straightness

Depends on Requirements of Buyer

6

Tolerance

OD / WT / Length :Acc.to Table 5

7

Mechanical Property

Tension Test, Flattening Test, Expansion Test, Flange Test(For Weld Tube), Reverse-Bend Test, Hydrostatic or Other Nondestructive Test

American Standard

Austenitic Steel:

TP304,TP304L,TP304H,TP304N, TP310S,TP316,TP316L,TP316Ti,TP316H, 

TP317,TP317L, TP321, TP321H,TP347, TP347H,904L…

Duplex Steel :

S32101,S32205,S31803,S32304,S32750, S32760

Others:TP405,TP409, TP410, TP430, TP439,...

European Standard

1.4301,1.4307,1.4948,1.4541,1.4878,1.4550,1.4401,1.4404,1.4571,1.4438,

1.4841,1.4845,1.4539,1.4162, 1.4462, 1.4362, 1.4410, 1.4501

Russia Standard

08Х17Т,08Х13,12Х13,12Х17,15Х25Т,04Х18Н10,08Х20Н14С2, 08Х18Н12Б,

10Х17Н13М2Т,10Х23Н18,08Х18Н10,08Х18Н10Т, 08Х18Н12Т,08Х17Н15М3Т,

12Х18Н10Т,12Х18Н12Т,12Х18Н9, 17Х18Н9, 08Х22Н6Т,

Corrosion Test

Conducted only when specially requested by the client

Chemical Analysis

Test done as per required quality standards

Destructive / Mechanical Testing

Tensile | Hardness | Flattening | Flare | Flange

Reverse-bend and Re. flat tests

Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms, which ensures trouble-free expansion, welding & use at customers end

Eddy Current Testing

Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System

Hydrostatic Testing

100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage, and biggest pressure we can support 20Mpa/7s .

Air Under Pressure Test

To check any evidence of air leakage

Visual Inspection

After passivation, every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections