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

0817,0813,1213,1217,1525,041810,0820142, 081812,

1017132,102318,081810,081810, 081812,0817153,

121810,121812,12189, 17189, 08226,

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

Product Name

Welding Stainless Steel Tube

Standard

ASTM A789

Material Grade

Duplex  Grade:S31803 / S32205 / S32304

Outer Diameter

6mm-101.6mm

Wall Thickness

0.3mm – 2.5mm

Length

Depends on Customers’ Request

Tolerance

According to ASTM A789 and ASTM A1016

Leakage Test

ET  Or  Hydraulic Test Or Air Pressure Test Under Water

Main  process

Welding, Bright Annealing,Pickled

Certificate

ISO 9001:2008, Manufacture License Of Pressure Tube

Marking

Brand, Standard, Grade, Size, Length and Heat No. Or Depends On Customer.

Packing

Bundles With Plastic Bags, Wooden Box With Angle Steel Frame Or others

Payment Terms

T/T, L/C at sight

Delivery Time

Generally 15Days – 45Days Or Depends on the quantity and Customers’ Request

Capacity

1000 Tons Per Month