Supp lemental Guidelines for the Implementation of DAO 19 -16 Series of 2019                                                           Page 1 of 6 
  
 
 
 
 
MEMORANDUM CIRCULAR NO. ___________  
Series of 202 2 
 
To  :   All Manufacturers  and Importer s of Steel  Pipe Products Covered by  
  DAO 19 -16, Series of 2019 and Others Concerned  
 
SUBJECT      :  Supplemental Guidelines f or the Impl ementation of DAO 1 9-16,    
                               Series of  2019  
 
 
WHEREAS , the Department Administrative Order (DAO) 19-16, Series of 201 9 took effect on 
22 February 2020 , the objective of which is to strictly ensure that steel pipe products comp ly 
with the specified safety and/or quality requ irement/s as prescribed therein;  
 
WHEREAS , Philippine National Standard (PNS) 2145 :2020  – Steel – Black and galvanized 
longitudinally welded lightweight steel tubes  – Specification  was promulgated in December  
2020 which specifies the classification and requirements for the materials, dimensions, color, 
methods of test, marking s and bundling of black and pre -galvanized longitudinally welded 
lightweight steel tubes intended for steel frame structures;  
 
WHEREAS, Rule 25.9 of DAO 19 -16:2019 provides that all steel pipes declared not within the 
scope of the DAO (e.g. fence tube, scaffolding tube, structural tube, etc.) shall be subject for 
inspection and verification by the BPS/DTI/RO/PO or BPS -recognized Inspection  Body. 
Certificate of Exemption shall be issued by BPS once verification showed that the inspected 
products are not within the scope of the DAO;  
 
WHEREAS , the Philippine Association of Black Iron and Galvanized Iron Pipes and Tubes 
Manufacturers, Inc. requested the mandatory certification of black and galvanized longitudinally 
welded lightweight steel tubes  due to influx of importation and to promote consumer safety ; 
 
WHEREAS , pursuant to Rule 23 of DAO 19 -16, Series of 2019, BPS may issue such 
procedural g uidelines as may be necessary in the implementation of this Order;  
 
WHEREFORE,  foregoing premises considered, this guideline is hereby issued to supplem ent 
the implementation of DAO 1 9-16, Series of 201 9 for the guidance of all concerned :  
 
 
1. SCOPE  
 
This Su pplemental Guideline includes the mandatory certification of black and 
galvanized longitudinally welded lightweight steel tubes, whether locally manufactured 
or imported . All provision s of DAO 19 -16, Series of 2019  shall apply , unless repealed  
by condition s set herein . 
 
 
2. SAMPLING PLAN  
 
To determine the specific number of samples for black and galvanized longitudinally 
welded lightweight steel tubes , the table below shall apply:  
 
 
 
 
Supp lemental Guidelines for the Implementation of DAO 19 -16 Series of 2019                                                           Page 2 of 6 
  
For nominal size (DN) of 15mm to 40mm  
Volume/Quantity  Sample  Sample 
Size Acceptance Quality Limit 
(AQL)  
ACCEPT14 REJECT15 
No. of failed/defective samples  
Up to 75,000pcs  1st set 3 0 2 
2nd set 3 1 2 
75,001 pcs – 
150,000pcs  1st set 5 0 3 
2nd set 5 3 4 
150,001 pcs – 
225,000pcs  1st set 8 0 3 
2nd set 8 4 5 
225,001 pcs – 
300,000pcs  1st set 13 2 5 
2nd set 13 6 7 
300,001pcs and 
above  1st set 20 3 6 
2nd set 20 9 10 
 
For nominal size (DN) of 50mm to 1 00mm 
Volume/Quantity  Sample  Sample 
Size Acceptance Quality Limit 
(AQL)  
ACCEPT  REJECT  
No. of failed/defective sampl es 
Up to 18,000pcs  1st set 3 0 2 
2nd set 3 1 2 
18,001 pcs – 
36,000pcs  1st set 5 0 3 
2nd set 5 3 4 
36,001 pcs – 
54,000pcs  1st set 8 0 3 
2nd set 8 4 5 
54,001 pcs – 
72,000pcs  1st set 13 2 5 
2nd set 13 6 7 
72,001pcs and above  1st set 20 3 6 
2nd set 20 9 10 
 
 
3. SAMPLING PROCEDURE  
 
3.1 The BPS, DTI ROs/POs, BPS -recognized auditing/inspection body shall 
facilitate the preparation of two (2) sets of black and hot dipped zinc -coated 
(galvanized) longitudinally welded steel pipes and black and galvanized 
longitudinally welded lightweight steel tubes  per type, per class, per nominal 
size (DN) and per brand for every sample drawn properly labeled as first set 
and second set.  
  
 3.1.1  First set  
 
One (1) meter long sample shall be cut from each piece, packed/s ealed and 
signed in the presence of authorized representatives from BPS, DTI ROs/POs 
or BPS -recognized auditing/inspection body.  
 
_______________________  
Sample Size Code Letters and Table 3 -A – Double Sampling Plans for Normal Inspections of PNS 2859 -1:2012 
were used as reference.  
ACCEPT   : If the number of failed samples is equal and less than the number indicated  
REJECT   : If the number of failed samples is equal to or more than the number indicated  
 
 
 
 3.1.2  Second set   
Supp lemental Guidelines for the Implementation of DAO 19 -16 Series of 2019                                                           Page 3 of 6 
  
Test samples drawn shall be pack ed/sealed and signed in the presence of 
authorized representatives from BPS, DTI ROs/POs or BPS -recognized 
auditing/inspection bod y and shall be kept by the manufacturer or importer. The 
preparation of cut samples shall only commence if the number of faile d samples 
from the first set is more than the AQL prescribed acceptance number but less 
than the prescribed rejection number.  
 
 
4. PRODUCT TESTING  
 
4.1. Product testing for black and galvanized longitudinally welded lightweight steel 
tubes  shall be conducted as fo llows:  
 
4.1.1.  Full Product Testing  
4.1.2.  Dimensional Tests  
4.1.2.1.  Length  
4.1.2.2.  Workmanship, Finish, and Appearance  
4.1.2.3.  Dimension  
4.1.2.4.  Mass per unit length  
4.1.3.  Mass of Zinc Coating  
4.1.4.  Bend Test (for tubes with nominal diameter of 50mm and below)  
4.1.5.  Flattening Test (for tubes with nominal diameter abo ve 50mm)  
 
4.2. To verify conformance to the aforementioned testing requirements, the test 
methods prescribed by the PNS 2145:2020 shall be used. Considering the 
regular updating of standards, the latest edition of the PNS shall be used as 
reference. It is under stood that future amendments of the PNS used in this 
Circular  shall be effective one (1) year after its promulgation to provide ample 
time to all stakeholders to adjust and conform to the new requirements, if any.  
 
 
5. MARKINGS  
 
For traceability and verificat ion purposes, the required markings for manufactured  or 
imported  black and galvanized longitudinally welded lightweight steel tubes  shall be 
properly marked at all times by rolling, stamping, or stenciling for verification by the 
BPS and DTI RO’s/PO’s, the ir authorized representatives, and by the duly authorized 
enforcement teams either at the manufacturer’s/importer’s warehouse or 
trader’s/distributors’/retailers’ warehouse, if applicable:  
 
5.1 The required markings on the pipes for black and galvanized lo ngitudinally welded 
lightweight steel tubes  shall be as follows:  
 
5.1.1  Trademark  or brand name  
5.1.2  The words "Structural Tube" or "Fence Tube"  
5.1.3  Nominal Diameter, in mm  
5.1.4  Length, in m  
5.1.5  The words "Product of the Philippines", if locally manufactured  or 
Country  of Origin,  if importe d 
5.1.6  The words "Not for Water Use"  
5.1.7  Lot / Batch Number; and  
5.1.8  PS Mark with License Number  
 
Note: Each pipe shall be marked with black paint on both ends of the tube.  
 
 
5.2 Tags securely and properly attached to each bundle containing all the following 
information stamped or printed in a manner that is legible and not easily erasable:   
Supp lemental Guidelines for the Implementation of DAO 19 -16 Series of 2019                                                           Page 4 of 6 
  
5.2.1  Trademark or  brand name  
5.2.2  Manufacturer’s or Importer’s name and address in the Philippines  
5.2.3  No. of pieces  
5.2.4  PS Mark with License Number  
 
In the absence of any of the required mark ings or submission of incomplete markings, 
the application for PS License , SOC or Certificate of Exemption shall not be processed 
until such time that the required markings are submitted or corrected.  
 
 
5 SURETY BOND  
 
For imported black and hot dipped zinc -coated (galvanized) longitudinally welded steel 
pipes and black and galvanized longitudinally welded lightweight steel tubes , a Surety 
Bond amounting One Hundred Fifty Thousand Pesos (Php 150,000.00) or five percent 
(5%) of the declared value/dutiable val ue in Philippine Peso, whichever is higher, shall 
be posted on a per shipment, per Bill of Lading/Airway Bill basis.  
 
 
6 REQUIRED CAPITALIZATION   
 
All importers of black and hot dipped zinc -coated (galvanized) longitudinally welded 
steel pipes and black and galvanized longitudinally welded lightweight steel tubes  shall 
be required to have at least Fifty (50) Million Pesos (Php 50,000,000.00) capitalization 
prior to importation. Proof of the same shall be submitted to BPS upon filing the 
application for Statem ent of Confirmation (SOC)  and Certificate of Exemption  as 
follows:  
 
6.2 Duly filed Articles of Incorporation showing minimum paid -up capitalization for 
corporations, or business permit and proof showing minimum declared 
capitalization for single proprietorship ; 
 
6.3 Copy of the latest Audited Financial Statement; and  
 
6.4 Other documentary proof showing capitalization.  
 
 
7 TRANSITORY PROVISIONS  
 
7.2 All manufacturers with existing valid PS License shall comply with the procedures 
and requirements of this Circular  on the subs equent surveillance audit. All pending 
PS applications received prior to the effectivity of this Circular  shall be processed 
in accordance with DAO 04:2008 and after the issuance of the PS License, 
manufacturers shall comply with the procedures and require ments of this Circular  
on the subsequent surveillance audit.  
 
7.3 For existing foreign PS License holders with multiple importers, a list of existing 
importers shall be forwarded to BPS. The importers within the said list shall submit 
a copy of the authorizati on from the manufacturer upon applying for SOC.  
 
7.4 The authority to import for existing importers shall be valid until the expiration of 
the License unless sooner revoked or superseded. Upon recertification, the 
foreign PS License holder shall appoint a spec ific importer to continue using the 
license number. For other and new/additional importers, new PS application shall 
be required.  
  
Supp lemental Guidelines for the Implementation of DAO 19 -16 Series of 2019                                                           Page 5 of 6 
 7.5 All PS License applications received after the effectivity of this Circular  shall be 
subject to the procedures and requiremen ts prescribed herein.  
 
7.6 All importations of black and galvanized longitudinally welded lightweight steel 
tubes  shall be subject for  inspection and verification by BPS/DT I RO/PO or BPS -
recognized Inspection Body  within twenty -four (24) months after the date of 
effectivity of this Circular . Certificate of Exemption  and corresponding mark  shall 
be issued by BPS upon  satisfactory result of inspection and verification.  
 
7.7 All existing m anufacturers, both local and foreign, of black and galvanized 
longitudinally wel ded lightweight steel tubes  covered by thi s Circular  shall apply 
and secure a PS License within twenty -four (24) months after the date of effectivity 
of this Circular . 
 
7.8 Twenty -four (24) months after the effectivity of this Circular , all local manufacturers  
of black and galvanized longitudinally welded lightweight steel tubes shall have a 
valid PS License. Likewise, all importations of black and galvanized longitudinally 
welded lightweight steel tubes  shall be sourced from manufacturing plant/s with a 
valid PS License  and shall comply with the SOC application requirements  
prescribed by DAO 19 -16, Series of 2019 and this Circular.  
 
7.9 All uncertified black and galvanized longitudinally welded lightweight steel tubes 
that are already distributed or offered for sal e in the local market or remaining 
inventories at the local manufacturer’s plant or warehouse  prior to the effectivity of 
this Circular shall apply for a certification from the BPS within thirty -six (36) months 
after the effectivity of this Circular . The a pplication shall be supported by the  
following:  
 
7.9.1  Summary of Products being applied for Certificate of Exemption listed in 
accordance to the format provided in Annex A  or B. 
7.9.2  Any documentary proof that the products are locally manufactured or 
imported prior to the effectivity of this Circular (e.g. Production Records, 
Import Entry, Bill of Lading, Notice of Arrival, etc.)  
 
Certificate of Exemption and corresponding mark  shall be issued upon satisfactory 
result of evaluation.  
 
7.10 To ensure strict compliance, moni toring and enforcement shall be conducted 
thirty -six (36) months after the effectivity of this Circular . After this period, only 
black and galvanized longitudinally welded lightweight steel tubes bearing a valid 
PS Mark  and other BPS -issued certification m ark shall be sold, offered for sale  or 
distributed in the local market.  
 
7.11 All non -compliant products shall be subject to the following:  
 
7.11.1  First Offense - Notice of Violation shall be issued but 
retailers/distributors shall only be advised to pull -out the ite ms from the 
selling area.  
 
7.11.2  Second Offense onwards - Notice of Violation shall be issued subject to 
the regular adjudication process.  
 
 
 
 
 
 
  
Supp lemental Guidelines for the Implementation of DAO 19 -16 Series of 2019                                                           Page 6 of 6 
  
8 REPEALING CLAUSE  
 
All other orders or parts thereof which are inconsistent with the provisions of this 
Circular are  hereby repealed or amended accordingly.  Other provisions not covered by 
this Memorandum Circular  shall remain  effective  thereof.  
 
This Memorandum Circular shall be effective fifteen (15) days  after its publication in a 
newspaper of general circulation, a copy of which shall be submitted to the UP Office of 
National Administrative Register.  
 
For the information and guidance of those concerned.  
 
Done in the City of Makati this _____  day of  _______  in the year 2022.  
 
Recommended by:  
 
 
                                                                                        
           NEIL P. CATAJAY                                                  ATTY. RUTH B. CASTELO             
               Director , BPS                                                          Undersecretary, CPG  
 
Approved by:  
 
RAMON M. LOPEZ  
Secretary