110KV 138KV HDG Galvanized Electric Power Post For Power Transmission Line

110KV 138KV HDG Galvanized Electric Power Steel Pole for Power Transmission Line

Product Description

The products above are 110kv 138kv Transmission Line Octagonal Galvanized Steel Power Pole

• Products are designed and manufactured according to structural standards
• Only our company can comply to these global manufacturing standards which gives us an edge over our competitors
• Products are hot dip galvanized according to ISO 1461/ASTM A123 standards
• Pole shaft material : ASTM GR65,GR50

To design in accordance with PLS software, we will require the following design parameters:

1. The operational wind speed of the region where the pole will be used
2. The Antenna load and height of the pole
3. The total height of the pole itself

Product Specifications

110kv 138kv Galvanized steel pole for philippines market NEA ,Meralco

Material

1.) BASEPLATES

ASTM A633 Grade E

Standard for Normalized High Strength Low Alloy Structural Steel Plates

YS 415 minimum

TS (550 – 690)

EL 18% minimum

2.) ANCHOR BOLTS

ASTM A615 Grade 75

Standard for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

YS 520 minimum

TS 690 minimum

EL 6% minimum

3.) ANCHOR BOLT NUTS

ASTM A563 Grade C
Standard for Carbon and Alloy Steel Nuts
Proof Load = 993 N/mm2 minimum
Hardness: Brinell (143 – 352) / Rockwell (B78 – C38)

4.) GROUNDING NUTS

ASTM A276 Type 304

Standard for Austenitic Stainless Steel Fasteners

YS 207 minimum

TS 518 minimum

EL 20% minimum

5.) WELDING MATERIAL

AWS D1.1 E70XX

YS 400 minimum
TS 480 minimum

The specification reference the following standards

Packaging & Shipping

We cover the top and bottom parts of the pole with a mat or straw bale in order to protect it from damage to the galvanized surface that may occur during transportation. Packaging can also be done according to clients’ requirements.

Tests

Type tests (essais de qualification)

• The performance tests of poles shall be borne by the supplier.
• EDCL requires that the following performance tests must be conducted in presence of a representative of EDCL before the first delivery.

Examinations of the poles (visual and dimensional monitoring)

• Dimensional Characteristics: the height, dimensions at the top end and the base, straightness of pole.
• Finished aspect inspection:
• well finished welding: absence of blisters filling and cuttings (“colmatage et bouture”) of soldering wire.
• well finished Galvanization: absence of extra thickness, needles, flow remains, joining and black spots.
• Markings and indications.
• Presence of mechanical protection at the top and at the base of the pole.
• Presence of earthing terminals

Coating Quality control:

In accordance with ISO 1461 standards or equivalent: Thickness Control of galvanization coating and Quality control of zinc (bath of galvanization).

Tests on poles (Mechanical tests)

Non-destructive bending test (checking of the elastic limit), It is the checking of the withstand of the pole subjected to a strain F applied to the top of the embedded pole; F = (nominal tensile tension x safety factor) + fictitious

Pressure of the wind.

Method of test:

The method consists of increasing slowly and regularly the load applied to the pole from 0 to F, and meanwhile noting the variation of sag (bending of pole) corresponding to the following loads: 25% F, 50% F, 75% F, 80% F, 90% F and 100% F.

After lasting 1 mn under the load F, the pole is discharged slowly and regularly until no-load (zero load). The residual sag will be noted down. The test is satisfactory if the residual sag does not exceed 2% of the sag corresponding to 100% F load, and neither disorder nor deformation appears on the pole.

Breaking Test

Loads are applied to the pole already subjected to the deflection test under the same conditions as those specified, however the progression of the loads is carried out continuously and non-stop until pole break occurs.

The value of the load leading to pole breaking will be noted down. The breaking stress must be equal to or higher than F.

Quality control of steel

A report relating to the quality of steel intended for manufacturing of the ordered poles, and in accordance with steel quality control of EN 10025 standard or equivalent must be provided to EDCL.

Acceptance tests

Acceptance tests shall be done in factory and will be borne by the supplier. Tests will be sanctioned by statements signed by the present parts. EDCL reserves the right to be represented in these tests.

Sampling will be done in accordance with the stipulations of the international standard and on the following basis:

• Level of control: S2
• Normal simple control: it is supposed that moving to reduced or reinforced control will be done in accordance with the stipulations of the abovementioned standard.
• Acceptable Level of quality (ALQ): 2.5. Moving from normal control to reduced or reinforced control will be made in accordance with the international standard.

Acceptance tests shall include the following tests:

A. visual and dimensional monitoring of poles; finished visual aspect inspection

• Well finished welding: blisters absence, filling and cuttings of soldering wire.
• Well finished galvanization: absence of extra thickness, needles, remains flow, joining and black spots.

B. Dimensions Inspection

• Dimensional Characteristics: Height, dimensions at the top end and the base.
• Presence of mechanical protection at the top and at the base of the pole.
• Thickness Control of galvanization coating. In accordance with the international standard.

Process of Production

Verification of Materials → Cutting → Molding or Bending → Vertical Welding → Verification of Dimensions → Flange Welding → Hole Drilling → Calibration→ Deburring Process → Galvanizing, Powder Coating or Painting → Recalibration → Threading → Packaging

FAQ