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Support Categories

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Ordering & Payment

Manage B2B invoices, credit lines, and bulk purchase agreements.

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Shipping & Delivery

Real-time logistics tracking, tanker schedules, and delivery alerts.

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Returns & Refunds

Dispute resolution, quality claims, and product return policies.

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Technical Support

Hardware maintenance guides and software integration support.

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Account Management

Profile security, multi-user permissions, and organizational settings.

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Compliance & Regulations

Industry standards, safety certifications, and environmental audits.

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Frequently Asked Questions (FAQ)

HSO Petroleum Services is a B2B marketplace for MRO (maintenance, repair & operations), PPE, valves, and critical supplies for the oil & gas sector. We connect buyers with verified suppliers offering genuine and standards-compliant products.

Valves (ball, gate, globe, butterfly, check), actuators, instrumentation (pressure gauges, transmitters), pipe & fittings (flanges, elbows, tees), gaskets & seals, pumps & compressors (and spares), electrical & industrial lighting, tools, welding, signage & safety, and PPE (hard hats, eyewear, respirators, gloves, FR apparel), among others. Availability varies by supplier.

Each listing includes technical specifications, applicable standards, and compatibilities. Filter by size, material (e.g., A105, 316/316L), pressure class/PSI, standard (e.g., API/ASME/ANSI), end connections (RF, RTJ, threaded, weld), and service (sweet/sour). Share your part number, drawing, or spec if you need assistance.

Yes. Many sellers support sour/corrosive service and can provide test certificates and documentation when applicable. Always confirm standard, material, and treatment on the product page and request additional documentation if required.
Yes. We onboard authorized manufacturers and distributors only. Where relevant, product pages show standards and certifications (e.g., API/ASME/ANSI/ISO). If your project needs traceability or Certificates of Conformance (CoC), request them with your order or RFQ.
Yes. Many suppliers offer volume pricing, long-term agreements (LTA), and BOM consolidation. Upload your BOM or request a formal quote.
Yes. If a part is obsolete or out of stock, suppliers can suggest functionally equivalent or compatible alternatives that meet the specified standard and service.
For quotes (RFQ), add items to cart and select ‘Request a quote’ or email your BOM with quantities, requirements, and target date. For orders, add to cart, complete shipping/billing, and choose payment method. You will receive an order confirmation.
We ship across the U.S. and, via eligible suppliers, internationally as well. Transit time and cost depend on destination, weight/volume, material type, and supplier. For exports, we can provide commercial invoice, packing list, and certificates as needed.
Typically 2–5 business days for in stock U.S. items; longer for make toorder, engineered, or import items. Each RFQ/order shows an estimated lead time and delivery window.
Yes. Once dispatched, you will receive a tracking number, carrier details, and a tracking link.
Major credit/debit cards, bank transfers, and corporate payments (depending on supplier). Credit terms may be available for large orders upon review.
Upon request, we can provide SDS (if applicable), CoC, MTR/CMTR, test charts, drawings, manuals, and spare parts lists. Ask at RFQ or before checkout.
We accept returns of unused items in original packaging per our Returns Policy. Manufacturer defects are covered under the OEM warranty. Contact support with your order number, photos, and description.
Visit ‘Sell with us’ and submit your legal info, catalog, certifications, and quality policy. We vet every supplier to ensure traceability, quality, and compliance.
Yes. Our team and OEMs can help with sizing, materials, compatibility, and applicable standards, particularly for valves, instrumentation, and PPE.
Yes. We work with suppliers operating under ISO 9001 (or equivalent) and able to deliver documentation required for project and audit compliance.
Taxes are calculated at checkout based on your location and applicable rules. For exports, exemptions or duties may apply at destination.
Yes. You can request scheduled deliveries, partial shipments, or consolidation, subject to availability.
Via email, contact form, or WhatsApp/Live Chat (when enabled). Include your PO or RFQ number for faster assistance.

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System Status

Logistics API OPERATIONAL
Payment Gateway MAINTENANCE
Marketplace Portal OPERATIONAL