ASTM A106 Steel Pipe

What is a ASTM A106 steel pipe?

ASTM A106 steel pipe (also covered in ASME specifications as S/A 106 pipe) is the standard specification for seamless carbon steel pipe for high-temperature service. Most common uses are in refineries and plants when gasses or fluids are transported at high temperatures and pressures.

fluid tubes - ASTM A106 Steel Pipe
astm a106 pipe - ASTM A106 Steel Pipe

Yaang Pipe Industry is a world leader in the supply of A106 / SA 106 pipe and stocks a full range of grades B/C in a size rage of NPS 1/8″ to NPS 48″, with nominal (average) wall thickness as given in ANSI B36.10. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specification*.

Pipe ordered under this specification shall be suitable for bending, for flanging, for welding, and for similar forming operations. A full range of A106 stock is available in Schedules 10 through 160, STD, XS, XXS. Unscheduled wall thicknesses available up to 4 inches.

Yaang Pipe Industry stocks a full range of A106 seamless carbon steel pipe.

Quantity Feet, centimeters, or number of lengths
Name of material Seamless
Grade Grade A, Grade B, or Grade C
Manufacture Hot-finished or cold-drawn
Size NPS or Outside Diameter and Schedule Number of Average Wall Thickness
Special outside diameter tolerance pipe
Inside diameter tolerance pipe, over 10 in ID
Length Specific or random
Supplementary requirements
Test Report Required
Specification designation
Hydrostatic test
Special requirements

 Grades B/C

 Sizes

NPS 1/8″ to NPS 48”
Wall thickness: Schedules 10 through 160, STD, XS, XXS.

*Commonly requested unscheduled walls up to 4” and certified minimum wall items

Chemical Properties % of ASTM A106 Steel Pipe

C, max. Mn P, max S, max Si, min Cr, max Cu, max Mo, max Ni, max V, max
Grade A * 0.25 0.27 – 0.93 0.035 0.035 0.10 0.40 0.40 0.15 0.40 0.08
Grade B 0.30 0.29 – 1.06 0.035 0.035 0.10 0.40 0.40 0.15 0.40 0.08
Grade C 0.35 0.29 – 1.06 0.035 0.035 0.10 0.40 0.40 0.15 0.40 0.08

*For each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.35%.

ASTM A106 (ASME SA106) Mechanical Properties
Grade Rm Mpa Tensile Strength Yield Point (Mpa) Elongation Delivery Condition
A ≥330 ≥205 20 Annealed
B ≥415 ≥240 20 Annealed
C ≥485 ≥275 20 Annealed
ASTM A106 (ASME SA106) Dimension Tolerances
Pipe Type Pipe Sizes Tolerances
Cold Drawn OD ≤48.3mm ±0.40mm
≥60.3mm ±1%mm
WT ±12.5%
JIS Number and Corrensponding Foreign Standards of ASTM A106 Steel Pipe
JIS
ASTM
BS
DIN
NF
ISO

Index Number

Std.No

Grade

Type

Std.No

Grade

Type

Std.No

Grade

Type

Std.No

Grade

Type

Std.No

Grade

Type

Std.No

Grade

Type

G3456

STPT370

(STPT38)

C
A106
GrA
C
3602
HFS360
C
17175
St35.8
C
A49-211
TU37b
C
2604/2
TS5
C
C004
CFS360
C
17177
St37.8
C
A49-213
TU37c
C
2604/3
TW9H
C
ERW360
C
A49-243
TU37c
C
CEW360
C

STPT410 

(STPT42)

 

C
A106
GrB
C
3602
HFS410
C
17175
St45.8
C
A49-211
TU42b
C
2604/2
TS9H
C
CFS410
C
17177
St42.8
C
A49-213
TU42c
C
ERW410
C
A49-243
TU42c
C
CEEW410
C

STPT480 

(STPT42)

C
A106
GrC
C
3602
HFS460
C
A49-211
TU48b
C
2604/2
TS14
C
CFS460
C
A49-213
TU48c
C
ERW460
C
CEEW460
C

(Note: This is summarized information from ASME Specification A106. Please refer to the specific Standard or Specification or contact us for more details.)

Permissible Variations in Wall Thickness

The minimum wall thickness at any point shall not be more than 12.5% under the nominal wall thickness specified.

Permissible Variations in Weights per Foot

Weight of any length shall not vary more than 10% over and 3.5% under that specified. NOTE — NPS 4 and smaller — weighed in lots. Larger sizes shall be weighed separately by length.

Permissible Variations in Outside Diameter

Outside Diameter at any point shall not vary from standard specified more than:

NPS [DN Designator] Over Under
in. mm in. mm
1/8 to 1-1/2 [6 to 40], incl 1/64 (0.015) 0.4 1/64 (0.015) 0.4
Over 1-1/2 to 4 [40 to 100], incl 1/32 (0.031) 0.8 1/32 (0.031) 0.8
Over 4 to 8 [100 to 200], incl 1/16 (0.062) 1.6 1/32 (0.031) 0.8
Over 8 to 18 [200 to 450], incl 3/32 (0.093) 2.4 1/32 (0.031) 0.8
Over 18 to 26 [450 to 650], incl 1/8 (0.125) 3.2 1/32 (0.031) 0.8
Over 26 to 34 [650 to 859], incl 5/32 (0.156) 4.0 1/32 (0.031) 0.8
Over 34 to 48 [850 to 1200], incl 3/16 (0.187) 4.8 1/32 (0.031) 0.8

Tensile Requirements

Seamless
  Grade A Grade B Grade C
Tensile Strength, min., psi 48,000 60,000 70,000
Yield Strength, min., psi 30,000 35,000 40,000

Number of Tests Required

NPS   On One Length from Each Lot of
Tensile 5 and smaller 400 or less
6 and larger 200 or less
Bending 2 and smaller 400 or less
Flattening 2 through 5 400 or less
6 and over 200 or less

Hydrostatic Testing

Inspection test pressures produce a stress in the steel pipe wall equal to 60% of specified minimum yield strength (SMYS) at room temperature. Maximum Pressures are not to exceed 2500 psi for NPS3 and must stay under 2800 psi for the larger sizes. Pressure is maintained for not less than 5 seconds.

Mechanical Tests Specified

Tensile Test — NPS 8 and larger — either transverse or longitudinal acceptable Smaller than NPS 8 — weighed in lots. Larger sizes — by length. Flattening Test — NPS 2-1/2 and larger. Bending Test (Cold) — NPS 2 and under.

Degree of Bend Diameter of Mandrel
For Normal A106 Uses 90 12 x nom dia. of pipe
For Close Coiling 180 8 x nom dia. of pipe

Lengths

Lengths required shall be specified on order. No “jointers” permitted unless otherwise specified. If no definite lengths required, following practice applies: Single Random — 17′ ~ 24′ lengths Double Random — 36′ ~ 44′ lengths

Description

1.standards: ASTM A106 (ASME SA106) 
2.products mainly used: apply to bending, curling and similar forming process. 
3.the main products of steel / steel grade: Gr.A; Gr.B; Gr.C. 
4.Specifications: diameter: 10.3 to 114.3 mm thickness: 0.8 to 12 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe. 
5.Chemical composition and mechanical properties 
6.JIS Number and Corrensponding Foreign Standards

Required Markings on Each Length

(On Tags attached to each Bundle in case of Bundled Pipe) Rolled, Stamped, or Stenciled (Mfrs. Option) Manufacturer’s name or brand. Length of pipe. A106 A, A 106 B, A 106 C. ANSI schedule number. Hydrostatic test pressures and/or NDE; Weight per foot (NPS 4 and larger) or NH if neither is specified. Additional “S” if tested supplementary requirements.

*ASTM A 106 grade B Seamless Pressure Pipe

B) Unless otherwise specified by the purchaser, for each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum will be permitted up to a maximum of 1.65 %.

*ASME SA 106 grade B Seamless Pressure Pipe

B) For each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum will be permitted up to a maximum of 1.35 %.

Characteristics of seamless pipe

Seamless tube process performance test: flattening test, tensile test, impact test, flaring test, hardness test, metallographic test, bending test, nondestructive testing (including eddy current X-ray and ultrasonic testing). 

Chemical analysis of seamless pipe: the chemical composition of the material for chemical analysis, chemical composition to meet the standard requirements. 

Seamless pipe pressure and hydrostatic test is for pressure tube by into the hydrostatic test, which do not maintain the prescribed pressure value not less than 5 seconds, not to disclose, the regular supply hydraulic pressure test is 2.45MPa pressure The pressure test is P = 0.5MPAa. 

The corrosion test: industrial corrosion-resistant steel pipe according to standard regulations or agreement between the corrosion of steel pipe corrosion resistance test, no intergranular corrosion. 

Characteristics of seamless pipe

  • the outer diameter is smaller.
  • High precision can do small quantities of raw.
  • cold drawn steel pipe with high precision and good surface quality.
  • steel pipe cross area is more complex.
  • steel pipe superior performance, relatively dense metal.

Source: China A106 Steel Pipe Manufacturer – Yaang Pipe Industry (www.steeljrv.com)

(Yaang Pipe Industry is a leading manufacturer and supplier of nickel alloy and stainless steel products, including Super Duplex Stainless Steel Flanges, Stainless Steel Flanges, Stainless Steel Pipe Fittings, Stainless Steel Pipe. Yaang products are widely used in Shipbuilding, Nuclear power, Marine engineering, Petroleum, Chemical, Mining, Sewage treatment, Natural gas and Pressure vessels and other industries.)

If you want to have more information about the article or you want to share your opinion with us, contact us at sales@steeljrv.com
Please notice that you might be interested in the other technical articles we’ve published:

  • How to get high quality alloy steel pipes
  • Knowledges of seamless steel pipes
  • How to get high quality stainless steel pipes
  • What is a welded steel pipe
  • Difference between galvanized steel pipe and seamless steel pipe
  • The difference between steel tubes and steel pipes
  • How to get high quality steel pipes
  • How to get high quality carbon steel pipes
  • How To Distinguish Inferior Steel Pipe
  • What is the difference between a steel pipe and a steel tube
  • Manufacturing process of cold rolled steel pipe

  • Cold Working Processes of Steel Pipes
  • The cutting processing technology of stainless steel pipe
  • The production process of welded stainless steel pipe
 • How to get high quality astm a335 chrome moly pipe
 • What is a welded steel pipe

 • How to get high quality ASTM A333 alloy pipes

 • ASTM A519

 • ASTM A213 Alloy Pipes

References:

  • https://www.yaang.com

Related News

العربيةБългарски简体中文繁體中文DanskNederlandsEnglishFrançaisDeutschBahasa IndonesiaItaliano日本語한국어LatinPortuguêsРусскийEspañolதமிழ்ไทยTürkçe