multi-lead rifled seamless steel tube for high-pressure boiler

Min.Order Quantity: 1 Ton

Supply Ability: 4800 Tons / Month

Port: Tianjin port

Certification: SGS、BV、API、CCIC,CE、ISO

Delivery Detail: 10-20 days

Payment Terms: FOB, T/T, L/C,Deferred Payment L/C

Our company accept payment after material  at your warehouse.


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  • Trade Assurance coverage.

multi-lead rifled seamless steel tube for high-pressure boiler

Applications: The rifled tubes are served in super/ultra super critical water wall panels over 300,000KW of boiler, chemical, electricity industries.

Thchnical speifications

ASME SA192, SA209, SA210, SA213, EN 10216, DN 17175, BS 3059, JIS 3461,JIS 3462.
Type: Type A, Type B, and Optimized Type.
Manufacturing method: Cold-drawn
Delivery Conditions: Normalized and Tempered

Steel grade

ASTM A192,ASTM A210 Gr.A1,Gr.C,
ASTM A209 T1,ASTM A213 T2,T5,T9,T11,T12,T22,T23,T91,T92 ST45.8/III
MATERIALS: All our steel is melted in-house through electric arc furnace route, than is ladle refined, 100% vacuum degassed, continuous cast and rolled.


Type A: OD28.6mm-76.2mm, WT6.38mm-18.33mm
Type B: OD35mm-66.7mm, WT7.2mm-8.55mm
No. of Ribs:12 max.
Max length: 26mtr


Hexagonal bundles, strapped, both ends protected with plastic net Or wooden boxes according to length and destination Oiled inside / outside
Marking,oil-coating,varnish,end-protection by plastic caps to be confirmed.

Tolerances for dimensions and thread parameters of internal thread
size:od:28.6mm-121mm  wt:5.1mm–16mm


size “A”Allowable deviation of type

“B”Allowable deviation of type

A OD:OD≤38.1 mm ±0.15 mm
38.1<OD<50.8 mm ±0.20 mm
50.8mm≤OD<63.5 mm ±0.25 mm
OD≥63.5 mm ±0.30 mm
B OD:OD≤38.1 mm ±0.15 mm
38.1<OD<50.8 mm ±0.20 mm
50.8≤OD<63.5 mm ±0.25 mm
OD≥63.5 mm ±0.30 mm
C Thread root diameter

:OD-(1.11×Minimum wall thickness×2)

OD≤38.1mm ±0.15 mm ±0.15 mm
38.1<OD<50.8 mm ±0.20 mm ±0.20 mm
50.8≤OD<63.5 mm ±0.25 mm ±0.25 mm
OD≥63.5 mm ±0.30 mm ±0.30 mm
E Minimum diameter Negative deviation  0 Negative deviation  0
F Minimum wall thickness 22% 22%
0 0
G Number of threads
I Thread width:
  J a Thread height:OD≤38.1 mm ±0.3 mm ±0.18 mm
38.1<OD<50.8 mm ±0.20 mm
50.8≤OD<63.5 mm ±0.23 mm
OD≥63.5 mm ±0.28 mm
K Side angle of thread ±15° ±15°
O Fillet radius
M Pitch of thread ±3.2 mm ±3.2 mm
N Thread lead ±3.2 mm×Number of threads ±3.2 mm×Number of threads
  Q b Spiral angle rating rating
T Top width (axial) ±1.3 mm ±1.3 mm
U Top (axial) groove width

a  YES“B”The maximum deviation of any thread height can exceed the allowable deviation value specified in the table, but shall not exceed the allowable deviation of 0.08 mm, and the average height of all threads shall be in accordance with the given deviation range

b  The rating is based on the axis of the pipe

Our Advantages:

1)      Fast Delivery: around 10days below 50Metric Tons after sight of Irrevocable L/C or   Deferred Payment L/C

Our company accept payment after material  at your warehouse.

2)      Quality Assured: Strictly acc. To International standard API & ASTM & BS & EN & JIS, with System ISO certification

3)      Good Service: supplied professional technical guide free of charge at anytime;

4)      Reasonable Price: to be better support your business;

High Quality Package :

1) In bundle with steel strip

2) First packing by plastic bag then strip; Details packing please see the picture in the detial description.

3) In bulk

4) Client' requirements

5) Delivery:

  • Container: 25 tons/container for pipe with usual outer diameter. For 20" container the max length is 5.85m; For 40" container the max length is 12
  • Bulk carrier: It is no requirements to the length of the pipe. But its booking space time is long.

Global Business

1. More than 10 years of sales experience

2. Product exported more than 150 countries

3. Arrange to produce according yo customer's request

Fast Delivery

1. AA level customs broker,Faster through

2. 20 years of experience in the freight forwarding company

3. Delivery Detail: 10-20 days

Trusted Quality

1. Certificate: API, CE, ISO9001.2000.MTC etc

2. Inspection: BV,SGS,others is avaliable.

3. A complete testing system and testing equipments

One-Step Service

1. Free sample can be provided

2. Small order is acceptable

3. OEM is acceptable

4. Any third party testing is acceptable




  • Phone0086-317-2159105


  • Phone0086-317-2159106