Zinc Coated Galvanized Seamless Tube Pipes

Galvanized pipes are steel pipes that have been dipped in or ionization a protective zinc coating to prevent corrosion and rust.
Galvanized piping was commonly installed in homes built. Size Range from DN15 1/2" to DN1200 48", the galvanized pipes can be both welded and seamless.

Galvanized pipe is mainly used for carrying water to supply home and commercial buildings; it may also serve as scaffolding frames because of its rust prevention. Galvanized pipes are used for countless outdoor and industrial applications because of the material's ability to protect against corrosion and salt.

Product Information/Product Description/Basis Information/Specification

Technology/ Technical Data Sheets

Thickness List for pipes as per ANSI B36.10

Unit: MM

Dimension Design

OD … Outside Diameter

ID … Inside Diameter

WT … Wall Thickness

L … Length

If minimum wall thickness is required variations are allowed on the plus side only

Butt Welding Ends

ANSI / ASME B16.25-2007

Fig. 4 Weld Bevel Details for GTAW Root Pass [WT > 3mm (0,12 in.) to 10mm (0,38 in.), Inclusive]

GENERAL NOTES:

a) This detail applies for gas tungsten arc welding (GTAW) of the root pass where nominal thickness is over 3mm

b) Linear dimensions are in millimeters with inch values in parentheses.

Straightness Requirement

tandard pipes and tubes are supplied straightened to the eye: for special applications the

permissible deviation from the straight line may be agreed between purchaser and pipe

manufacturer; the maximum permissible deviation from the straight line related

to the length of measurement L is to be indicated, e.g. 1mm/1000mm.

Eccentricity

E is half of the difference between biggest and smallest

wall thickness (WT) values in one cross section.

In terms of mm:

However, eccentricity is expressed as a percentage of the mean wall thickness of this cross section

Mean Diameter inside and outside

D0 is the arithmetic mean between the smallest and biggest tube diameter on any one pipes or tube

circumference. If minimum wall thickness is required variations are allowed on the plus side only

Ovality

O is the difference between biggest and smallest diameter on any one tube circumference

As a percentage of the mean diameter this is:

Ovality must not be confused with eccentricity.

Welded PIPE MANUFACTURING PROCESS

Application/Usage

This Galvanized steel pipe is used for widely variety of applications that require advanced corrosion protection,
for instance, outdoor near the sea, irrigation pipe, water pipe, and electrical application.

FAQ: Question and Answers

Q: What is the different between seamless pipes and seamless Tubes?

A: Seamless steel pipes shall not be confused with seamless tubes. Indeed, there are a few important differences between pipes and tubes, which are not only semantic. In general, the word “pipe” applies to any tubular used to convey fluids, whereas the word “tube” applies to tubular sections (of various shapes, round, oval, squared) used for structural/mechanical applications, instrumentation systems, and the construction of pressure equipment like boilers, heat exchangers, and superheaters.

Q: What is the tolerance of the seamless pipes

A: Dimensions tolerance for API 5L /A106GR.B seamless pipe.

1. For outer diameters less than 2 3/8 in (60.3 mm), pipe body diameter tolerance +/-0.5 mm. Pipe end +/- 0.5 mm; Out of Roundness tolerance for pipe body is 0.9 mm (0.036 in), pipe end 0.6 mm (0.024 mm).

2. For OD equal or above 2 3/8 in (60.3) to 24 in (610 mm), (diameter tolerance) for pipe body is +/- 0.0075D,pipe end +/- 0.005D but max to +/-1.6 mm (0.063mm);

Roundness tolerance for pipe body≤0.015D, pipe end≤0.01D.

(In case agreed with manufacturer and client, more strictly tolerances could be applied)

3. For wall thickness

Below than 4 mm (0 0157 in), tolerance +0.6 (0.024 mm), -0.5 mm (0.020 in);

For API 5L seamless steel pipe thickness in 4 mm to 10 mm (0.394 in), +0. 150t, -0.125t;

For API seamless pipe thickness 10 mm to 25mm (0.984 in), +/-0.125t;

Wall thickness≥25 mm, +3.7mm or +0.1t (if larger) and -3.0 mm (0.120 in) or -0.1t (if larger).

t for thickness,

4. For straightness, max for full length, tolerance maximum 0.15% of length.

5. Straightness, max deviation for pipe end, shall be≤0.3 mm /m.

6. Length +/- 200 mm for general, +/- 25.4 mm for special.