Production Standard

ASTM A312

Material Grade

304 / 1.4301

Commodity Name

Stainless Steel Large Diameter Pipe

Delivery Condition

Anneal Or Pickled

Certificate

ISO 9001-2008, Manufacture License Of Pressure Tube

Inspection By The Third Party

SGS / BV / TUV

Size Range:

Production

Outside Diameter

Wall Thickness

Large Diameter Pipe

NPS 1/8 - NPS 30

Sch 5S / 10S / 40S / 80S

A312

Seamless/Welded Austenitic Stainless Steel Pipe

Item

Contents

Requirements

1

Materail

TP304, TP304L, TP304H, TP310S, TP316, TP316L, TP316Ti, TP316H, TP317L, TP321

2

Welding Method

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

3

Chemical Composition

A312 Item7, 8

4

Heat Treatment

Anealing Acc.to A312 Table2

5

Straightness

Depends on Requirements of Buyer

6

Tolerance

Dimention:Acc.to A999 Table 1
Wall Thickness:A312 Table3.
Length:<=7.3m,Tolerance +0~+6mm;>7.3m,Depends on The Buyer and Seller

7

Mechanical Property

Tension Test, Flattening Test,Hydrostatic or Other Nondestructive Test

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

1)Product : Stainless Steel Large Diameter Pipe

2)Standard:ASTM A312

3)Material Grade: 304 / 1.4301

4)Outer Diameter: NPS 1/8 - NPS 30

5)Wall Thickness: Sch5S /10S / 40S / 80S

6)Length:Depends on Customers’ Request

7)Tolerance:According to ASTM A312

8)Leakage Test:ET, UT, RT Or Hydraulic Test

9)Main  process:Welding, Annealing Or Pickled

10)Certificate:ISO 9001:2008, Manufacture License Of Pressure Pipe

11)Marking:Brand, Standard, Grade, Size, Length and Heat No. Or Depends On Customer.

12)Packing:Bundles With Plastic Bags, Wooden Box With Angle Steel Frame Or others

13)Payment Terms:T/T, L/C at sight

14)Delivery Time:Generally 15Days – 45Days Or Depends on the quantity and Customers’ Request

15)Capacity:1000 Tons Per Month

1.ISO System

2.Manufacture License of Pressure Tube

3.Production experience about 20 years.

4.Raw Material are from POSCO,BAO STEEL,TISCO,CRUPP ETC

5.Market -More than 30 countries worldwide.

6.We have the most convenient transport from shanghai and timely delivery.

7.We offer competitive prices based on good quality.

8.We have high technical production line with top quality products.

9.We have win high reputation based on good quality.